Community Medicine
2 questionsIn a given population: - less than 15 years: 6000 - 15 to 64 years: 12000 - 65 years and above: 2000 Calculate the dependency ratio.
In a study done in a hospital, patients were categorized into three groups based on disease prevalence (Low, Medium, High), and individuals were then randomly selected from each group. What type of sampling is this?
INI-CET 2025 - Community Medicine INI-CET Practice Questions and MCQs
Question 111: In a given population: - less than 15 years: 6000 - 15 to 64 years: 12000 - 65 years and above: 2000 Calculate the dependency ratio.
- A. 50 %
- B. 75 %
- C. 33 %
- D. 66 % (Correct Answer)
Explanation: ***66 %*** - The **Dependency Ratio** measures the ratio of the economically dependent population to the economically productive population, usually expressed as a percentage. - **Dependent Population** (aged < 15 and ≥ 65): 6000 + 2000 = **8000** - **Productive Population** (aged 15-64): **12000** - **Dependency Ratio**: (8000 / 12000) × 100 = **66.67%** (rounded to 66%) *Incorrect: 33 %* - This figure is significantly lower than the true ratio and results from calculating the ratio of the dependent population to the **total population**, which is not the standard definition of the Dependency Ratio. - 33.3% represents the dependent population (8000) as a proportion of the total population (20000), not the dependency burden on the working population. *Incorrect: 50 %* - This result is obtained if only the young dependent group is used in the numerator (Young Dependency Ratio = 6000 / 12000 = **50%**). - However, the total Dependency Ratio must account for **both young and old dependents** to accurately reflect the economic burden. *Incorrect: 75 %* - Obtaining 75% would require the dependent population to be 9000 (i.e., 9000 / 12000), which is higher than the actual 8000 dependents. - This option represents an overestimation of the dependent burden on the working population.
Question 112: In a study done in a hospital, patients were categorized into three groups based on disease prevalence (Low, Medium, High), and individuals were then randomly selected from each group. What type of sampling is this?
- A. Systematic random sampling
- B. Cluster random sampling
- C. Simple random sampling
- D. Stratified random sampling (Correct Answer)
Explanation: ***Correct: Stratified random sampling*** - This method involves dividing the population into non-overlapping subgroups (**strata**) based on a characteristic (here, disease prevalence: Low, Medium, High). - Subsequently, a **simple random sample** is drawn from *each* stratum independently to ensure representation from all groups. - This ensures that each subgroup is adequately represented in the final sample, making it ideal when the population has distinct subgroups. *Incorrect: Simple random sampling* - Every individual in the entire population has an equal and independent chance of being selected. - It does not involve dividing the population into specific subgroups or categories before selection. - This method may underrepresent or overrepresent certain subgroups by chance. *Incorrect: Systematic random sampling* - This involves selecting every *k*th element after a random start point, where *k* is the sampling interval (Population Size/Sample Size). - Like simple random sampling, it does not involve creating predefined strata based on characteristics like disease prevalence. - It's a simpler alternative to simple random sampling but doesn't ensure representation of specific subgroups. *Incorrect: Cluster random sampling* - The population is divided into natural groupings (**clusters**), such as geographical areas or schools. - Unlike stratification, entire clusters are randomly selected, and *all* individuals within the selected clusters (or a random sample thereof) are included in the study. - This differs from stratified sampling where we sample from ALL strata; in cluster sampling, we sample only SOME clusters.
ENT
3 questionsChoose the most appropriate candidates for cochlear implants: 1. Ototoxicity 2. Congenital hearing loss 3. Ossicular fixation 4. Otosclerosis
A 50-year-old female complains of an episode of acute vertigo with vomiting and unsteadiness and light-headedness, which was triggered by changing her head position in the morning. She denied hearing loss, recent viral illness, medication use, head injury, or trauma. Choose the most appropriate diagnosis:
Which of the following is incorrect regarding Juvenile Nasopharyngeal Angiofibroma (JNA)?
INI-CET 2025 - ENT INI-CET Practice Questions and MCQs
Question 111: Choose the most appropriate candidates for cochlear implants: 1. Ototoxicity 2. Congenital hearing loss 3. Ossicular fixation 4. Otosclerosis
- A. 3 and 4
- B. 1 and 2 (Correct Answer)
- C. 2 and 3
- D. 1 and 4
Explanation: ### Explanation The core principle of a **Cochlear Implant (CI)** is to bypass a non-functional or damaged cochlea (specifically the hair cells) and directly stimulate the **Auditory Nerve**. Therefore, the ideal candidate must have **Severe to Profound Sensorineural Hearing Loss (SNHL)** with a functioning auditory nerve. #### Why 1 and 2 are Correct: * **Ototoxicity (1):** Drugs like aminoglycosides or cisplatin cause permanent damage to the **outer and inner hair cells** of the cochlea, resulting in bilateral SNHL. Since the auditory nerve remains intact, these patients are excellent candidates for CI. * **Congenital Hearing Loss (2):** Children born with bilateral profound SNHL (Pre-lingual) are the primary target for CI. Early implantation (ideally before age 2) is crucial for the development of speech and language due to **neural plasticity**. #### Why 3 and 4 are Incorrect: * **Ossicular Fixation (3) & Otosclerosis (4):** These conditions primarily cause **Conductive Hearing Loss (CHL)** because the pathology lies in the middle ear (mechanical conduction). * **Otosclerosis** is typically managed with a **Stapedectomy** or hearing aids. * *Note:* While "Far-advanced Otosclerosis" can lead to SNHL, it is not the primary or most common indication compared to the options provided. --- ### High-Yield Clinical Pearls for INI-CET: * **Site of Action:** CI bypasses the **Organ of Corti** to stimulate the **Spiral Ganglion** of the auditory nerve. * **Prerequisite:** A visible **Auditory Nerve** on MRI (Internal Auditory Canal) is mandatory before surgery. * **Contraindications:** * **Michel Aplasia** (Complete absence of inner ear structures). * **Aplasia of the Auditory Nerve**. * Active middle ear infections. * **Mondini Dysplasia:** This is a partial aplasia of the cochlea (1.5 turns instead of 2.5); these patients **can** still receive a CI.
Question 112: A 50-year-old female complains of an episode of acute vertigo with vomiting and unsteadiness and light-headedness, which was triggered by changing her head position in the morning. She denied hearing loss, recent viral illness, medication use, head injury, or trauma. Choose the most appropriate diagnosis:
- A. Vestibular neuritis
- B. BPPV (Correct Answer)
- C. Acoustic neuroma
- D. Meniere disease
Explanation: ### **Explanation: Benign Paroxysmal Positional Vertigo (BPPV)** The clinical presentation of **recurrent, brief episodes of vertigo triggered by head movements** (like rolling over in bed or getting up in the morning) without associated hearing loss is classic for **BPPV**. #### **Why BPPV is the Correct Answer** * **Mechanism:** It is caused by **canalolithiasis** (displaced otoconia, usually from the utricle into the **posterior semicircular canal**). * **Key Features:** Vertigo is **positional**, lasts for **seconds to minutes**, and is associated with autonomic symptoms like nausea/vomiting. * **Absence of "Red Flags":** The lack of hearing loss, tinnitus, or recent viral prodrome helps differentiate it from other vestibular disorders. #### **Why Other Options are Incorrect** * **Vestibular Neuritis:** Presents as a **prolonged, single episode** of severe vertigo (lasting days) often following a **viral upper respiratory infection**. It is not transiently triggered by head movement. * **Acoustic Neuroma:** A slow-growing tumor of the CN VIII. It typically presents with **progressive unilateral sensorineural hearing loss (SNHL)** and tinnitus rather than acute positional vertigo. * **Meniere Disease:** Characterized by a triad of **episodic vertigo (lasting 20 mins to hours)**, fluctuating SNHL, and **tinnitus/aural fullness**. #### **High-Yield Clinical Pearls for INI-CET** * **Gold Standard Diagnosis:** **Dix-Hallpike Maneuver** (look for geotropic, rotatory nystagmus with latency and fatigability). * **Treatment of Choice:** **Epley Maneuver** (Canalith Repositioning Procedure). * **Most Common Canal Involved:** **Posterior Semicircular Canal** (90% of cases). * **Nystagmus Characteristics:** In BPPV, the nystagmus is **paroxysmal** (starts after a few seconds) and **fatigable** (decreases with repeated testing).
Question 113: Which of the following is incorrect regarding Juvenile Nasopharyngeal Angiofibroma (JNA)?
- A. Biopsy is contraindicated
- B. Epistaxis is the most common presenting symptom
- C. Unilateral cervical lymph nodes are a common feature (Correct Answer)
- D. Only seen in young boys
Explanation: ### **Explanation: Juvenile Nasopharyngeal Angiofibroma (JNA)** **Juvenile Nasopharyngeal Angiofibroma (JNA)** is a benign but locally aggressive, highly vascular tumor. #### **Why Option C is Incorrect (The Correct Answer)** * **JNA is a benign tumor:** By definition, benign tumors do not metastasize. Therefore, **cervical lymphadenopathy is NOT a feature** of JNA. * If a young male presents with a nasopharyngeal mass and cervical lymphadenopathy, the clinician should suspect **Nasopharyngeal Carcinoma (NPC)** or Lymphoma instead. #### **Analysis of Other Options** * **A. Biopsy is contraindicated:** Because the tumor is composed of thin-walled blood vessels lacking a muscular coat (*tunica media*), it is prone to **profuse, life-threatening hemorrhage**. Diagnosis is made clinically and via imaging (CT/MRI); biopsy is strictly avoided unless done in an operating room under extreme caution. * **B. Epistaxis is the most common symptom:** The classic presentation is a triad of **painless, progressive nasal obstruction**, **recurrent profuse epistaxis**, and a mass in the nasopharynx. * **D. Only seen in young boys:** JNA is an **androgen-dependent** tumor seen almost exclusively in adolescent males (typically ages 10–20). If seen in a female, genetic testing (karyotyping) is often recommended. --- ### **High-Yield Clinical Pearls for NEET-PG/INI-CET** * **Origin:** Most commonly from the superior border of the **sphenopalatine foramen**. * **Holman-Miller Sign (Antral Sign):** A pathognomonic radiological finding on CT showing **anterior bowing of the posterior wall of the maxillary sinus**. * **Frog-Face Deformity:** Occurs due to the widening of the nasal bridge and proptosis in advanced stages. * **Investigation of Choice:** **Contrast-Enhanced CT (CECT)** to assess bony involvement; **Angiography** is done to identify the feeding vessel (usually the **Internal Maxillary Artery**) and for preoperative embolization. * **Treatment:** Surgical excision (e.g., Transpalatal, Maxillary swing, or Endoscopic approach) preceded by **preoperative embolization** to reduce blood loss.
Ophthalmology
3 questionsWhich of the following is seen in proliferative diabetic retinopathy?
Following a fungal corneal ulcer, a farmer underwent corneal transplant surgery. What is the preservative used for storing the donor corneal graft and the suture material used in the procedure?
Acute hemorrhagic conjunctivitis is caused by which of the following combinations?
INI-CET 2025 - Ophthalmology INI-CET Practice Questions and MCQs
Question 111: Which of the following is seen in proliferative diabetic retinopathy?
- A. Tractional retinal detachment (Correct Answer)
- B. No retinal detachment
- C. Exudative retinal detachment
- D. Rhegmatogenous retinal detachment
Explanation: ### **Explanation: Diabetic Retinopathy and Retinal Detachment** The hallmark of **Proliferative Diabetic Retinopathy (PDR)** is **Neovascularization** (growth of new, fragile vessels) in response to chronic retinal ischemia. #### **Why Tractional Retinal Detachment (TRD) is Correct:** In PDR, neovascularization is accompanied by the proliferation of **fibrovascular membranes**. These membranes grow along the posterior hyaloid face and into the vitreous cavity. Over time, these fibrous bands undergo **contraction**, exerting mechanical "pull" or traction on the sensory retina. This pulls the neurosensory retina away from the underlying Retinal Pigment Epithelium (RPE), leading to **Tractional Retinal Detachment**. * **Key Feature:** TRD in PDR typically has a **concave configuration** and is non-rhegmatogenous (no hole/tear initially). #### **Why Other Options are Incorrect:** * **Exudative Retinal Detachment:** This occurs due to fluid leakage from the choroid (e.g., tumors, VKH syndrome, or inflammatory conditions). While PDR involves leakage (edema), it does not typically cause a full exudative detachment. * **Rhegmatogenous Retinal Detachment (RRD):** This is caused by a **full-thickness retinal break** (hole/tear) allowing liquefied vitreous to enter the subretinal space. While a TRD can occasionally progress to a "Combined" detachment if a tear forms, the primary mechanism in PDR is tractional. * **No Retinal Detachment:** This describes Non-Proliferative Diabetic Retinopathy (NPDR) or very early PDR before fibrous proliferation occurs. --- ### **High-Yield Clinical Pearls for INI-CET:** * **Management of TRD:** The gold standard treatment for a tractional detachment involving the macula is **Pars Plana Vitrectomy (PPV)** with membrane peeling. * **Indications for PRP:** Pan-retinal photocoagulation is indicated in **High-Risk PDR** to regress neovascularization. * **Vitreous Hemorrhage:** The most common cause of sudden, painless vision loss in a long-standing diabetic is vitreous hemorrhage (secondary to PDR). * **NVI:** Neovascularization of the Iris (Rubeosis Iridis) can lead to **Neovascular Glaucoma**, a dreaded complication of PDR.
Question 112: Following a fungal corneal ulcer, a farmer underwent corneal transplant surgery. What is the preservative used for storing the donor corneal graft and the suture material used in the procedure?
- A. Polyethylene glycol, Nylon
- B. Moist chamber, Vicryl
- C. Ethanol, Silk
- D. McCarey-Kaufman, Nylon (Correct Answer)
Explanation: ### **Explanation** The correct answer is **D. McCarey-Kaufman, Nylon.** #### **1. Why the Correct Answer is Right** * **Donor Storage:** The **McCarey-Kaufman (MK) medium** is a classic short-term storage solution (up to **4 days** at 4°C). It consists of Tissue Culture Medium 199 and **Dextran**, which acts as an osmotic agent to prevent corneal edema. In modern practice, Optisol-GS is more common, but MK medium remains a high-yield exam answer for short-term storage. * **Suture Material:** **10-0 Monofilament Nylon** is the gold standard for **Penetrating Keratoplasty (PKP)**. It is non-absorbable, has high tensile strength, and produces minimal tissue reaction, which is crucial for maintaining a clear graft-host interface. #### **2. Why Other Options are Wrong** * **Option A:** **Polyethylene glycol** is used in some pharmaceutical formulations but is not a primary corneal storage medium. * **Option B:** **Moist chamber** storage (whole globe in a sterile jar) is only viable for **under 24 hours**. **Vicryl** (Polyglactin) is an absorbable suture; its rapid degradation and high inflammatory profile make it unsuitable for corneal grafts. * **Option C:** **Ethanol** is used to preserve tissue for **Gundersen Flaps** or certain tectonic grafts, but it kills the corneal endothelium, making it useless for optical transplants. **Silk** is multifilament and highly inflammatory, leading to vascularization and graft rejection. #### **3. Clinical Pearls for INI-CET** * **Storage Durations:** * **Short-term (4 days):** MK Medium. * **Intermediate-term (up to 14 days):** Optisol-GS (contains Chondroitin sulfate + Gentamicin/Streptomycin). * **Long-term (months):** Organ Culture (31°C) or Cryopreservation. * **The Endothelium:** The primary goal of storage media is to maintain **endothelial cell viability**, as these cells do not regenerate. * **Suture Removal:** In PKP, sutures are typically left for **6–12 months** due to the slow healing of the avascular cornea.
Question 113: Acute hemorrhagic conjunctivitis is caused by which of the following combinations?
- A. Coxsackie A and Enterovirus 70 (Correct Answer)
- B. Coxsackie B and Enterovirus 70
- C. Coxsackie A, Coxsackie B and Enterovirus 70
- D. Coxsackie A and Coxsackie B
Explanation: ### **Explanation: Acute Hemorrhagic Conjunctivitis (AHC)** **Acute Hemorrhagic Conjunctivitis (AHC)** is a highly contagious, self-limiting viral infection characterized by rapid onset, lid edema, and pathognomonic **subconjunctival hemorrhages**. #### **1. Why Option A is Correct** The primary etiological agents for AHC are **Enterovirus 70 (EV-70)** and **Coxsackievirus A24 (CA24)** variant. These are small RNA viruses belonging to the *Picornaviridae* family. * **Enterovirus 70** was the first identified cause during the 1969 pandemic. * **Coxsackie A24** is responsible for several subsequent large-scale outbreaks worldwide. #### **2. Why Other Options are Incorrect** * **Options B, C, and D:** These include **Coxsackie B**. While Coxsackievirus B is a common cause of myocarditis, pleurodynia (Bornholm disease), and meningitis, it is **not** a recognized cause of acute hemorrhagic conjunctivitis. The ocular tropism is specific to the **A24 variant** of Coxsackie A. --- ### **High-Yield Clinical Pearls for NEET-PG / INI-CET** * **Incubation Period:** Extremely short, typically **12 to 48 hours**. * **Clinical Hallmark:** Multiple **petechial hemorrhages** on the bulbar conjunctiva that may coalesce to form a large subconjunctival hemorrhage. * **Neurological Association:** A rare but serious complication of **Enterovirus 70** is a **polio-like paralysis** (radiculomyelitis), which can occur several weeks after the conjunctivitis resolves. * **Differential Diagnosis:** * **Epidemic Keratoconjunctivitis (EKC):** Caused by **Adenovirus (Serotypes 8, 19, 37)**. It presents with prominent pseudomembranes and corneal involvement (subepithelial infiltrates) but less frequent hemorrhage compared to AHC. * **Management:** Supportive treatment only (cold compresses, lubricants); antibiotics are used only to prevent secondary bacterial infection.
Pediatrics
2 questionsWhich of the following diagnoses can cause stridor in infants? 1. Laryngomalacia 2. Congenital hemangioma 3. Subglottic stenosis 4. Recurrent respiratory papillomatosis (RRP)
A 7-year-old child with a history of ear infection is complaining of lockjaw and limb spasm/fever/neck rigidity. Choose the most appropriate diagnosis:
INI-CET 2025 - Pediatrics INI-CET Practice Questions and MCQs
Question 111: Which of the following diagnoses can cause stridor in infants? 1. Laryngomalacia 2. Congenital hemangioma 3. Subglottic stenosis 4. Recurrent respiratory papillomatosis (RRP)
- A. 1, 3 and 4 (Correct Answer)
- B. 1 and 3
- C. 2 and 3
- D. 1 and 4
Explanation: ***1, 3 and 4*** - This option correctly identifies the three most common and clinically significant causes of stridor in infants - **Laryngomalacia (1)** is the most common cause of congenital stridor (60-75% of cases), presenting with inspiratory stridor that worsens with agitation - **Subglottic stenosis (3)** is the second most common cause of congenital stridor, presenting with biphasic stridor and may be congenital or acquired - **Recurrent respiratory papillomatosis/RRP (4)** caused by HPV (types 6 and 11) causes progressive airway obstruction with stridor and hoarseness - While congenital (subglottic) hemangiomas can cause stridor, they are less common than the above three conditions and typically present between 1-3 months of age *Incorrect: 1 and 3* - This option is incomplete as it excludes **RRP (4)**, which is an important cause of pediatric airway obstruction - RRP typically presents in early childhood and requires serial surgical debulking *Incorrect: 2 and 3* - This option incorrectly excludes **Laryngomalacia (1)**, which is the single most common cause of stridor in infants - Missing laryngomalacia in the differential diagnosis would be a significant oversight *Incorrect: 1 and 4* - This option fails to include **Subglottic stenosis (3)**, the second most common cause of congenital stridor - Subglottic stenosis can be life-threatening and requires urgent evaluation and management
Question 112: A 7-year-old child with a history of ear infection is complaining of lockjaw and limb spasm/fever/neck rigidity. Choose the most appropriate diagnosis:
- A. Meningitis
- B. Tetanus (Correct Answer)
- C. Bezold abscess
- D. Sinus thrombosis
Explanation: ***Tetanus*** - The striking combination of **lockjaw (trismus)** and generalized **limb spasms** is the hallmark clinical presentation of **Tetanus**, caused by the neurotoxin from *Clostridium tetani*. - The presence of **fever** and **neck rigidity** alongside an antecedent **ear infection** (potential portal of entry) strongly supports this diagnosis. - Tetanus causes sustained muscle contractions due to the inhibition of inhibitory neurons, leading to characteristic trismus, risus sardonicus, and opisthotonus. - Note: This is distinct from metabolic **tetany** (hypocalcemia), which causes carpopedal spasm without fever or lockjaw. *Incorrect: Meningitis* - While meningitis causes **fever** and **neck rigidity** (nuchal rigidity), it does not typically present with severe **lockjaw (trismus)** or sustained generalized **muscle spasms**. - Meningitis usually presents with headache, photophobia, altered consciousness, and positive Kernig's/Brudzinski's signs. *Incorrect: Bezold abscess* - A Bezold abscess is a deep neck abscess complicating mastoiditis, causing localized symptoms like neck pain, swelling, and **torticollis** (fixed head tilt). - It does not cause neuromuscular hyperexcitability resulting in **lockjaw** and widespread **limb spasms**. *Incorrect: Sinus thrombosis* - Lateral sinus thrombosis is a complication of otitis media presenting with **picket-fence fever**, headache, and signs of raised intracranial pressure. - It does not cause the characteristic muscle spasms and lockjaw seen in this presentation.