Nutrition and Health Practice Questions

Q: How many doses of vitamin A are required to treat deficiency?

3. **Explanation** The treatment of clinical Vitamin A deficiency (Xerophthalmia) follows a specific therapeutic schedule designed to rapidly restore hepatic stores and prevent permanent ocular damage. **Why Option C is Correct:** According to the WHO and National guidelines, the treatment of Vitamin A deficiency requires **3 doses** administered at specific intervals to ensure both immediate recovery and long-term replenishment: * **Dose 1:** Administered immediately upon diagnosis (Day 0). * **Dose 2:** Administered the following day (Day 1). * **Dose 3:** Administered four weeks later (Day 28). The first two doses act to saturate the tissues and initiate the healing of corneal lesions, while the third dose replenishes the liver's functional reserves to prevent recurrence. **Why Other Options are Incorrect:** * **Option A & B:** A single or double dose is insufficient for treating established clinical deficiency. While a single dose is used for *prophylaxis* (prevention), it does not provide the sustained levels needed for *therapeutic* recovery. * **Option D:** Four doses are not part of the standard acute treatment protocol. Excessive administration increases the risk of hypervitaminosis A (toxicity). **NEET-PG High-Yield Pearls:** * **Dosage:** For children >1 year, each dose is **2 lakh IU** (1 lakh IU for infants 6–12 months). * **Prophylaxis Schedule:** Under the National Vitamin A Prophylaxis Program, a total of **9 doses** are given until 5 years of age (1st dose at 9 months with Measles vaccine, then every 6 months). * **Earliest Sign:** Conjunctival Xerosis (objective); Night Blindness (subjective). * **Bitot’s Spots:** These represent squamous metaplasia and are the most characteristic sign of deficiency.

Q: What is the best indicator for monitoring the impact of the Iodine Deficiency Disorders Control programme?

Prevalence of goiter among school children. **Explanation:** The National Iodine Deficiency Disorders Control Programme (NIDDCP) utilizes specific indicators to assess the severity of iodine deficiency and the effectiveness of interventions. **Why Option A is Correct:** The **Prevalence of Goiter among school children (6–12 years)** is considered the best indicator for **monitoring the long-term impact** of the programme. School children are a representative group of the community, easily accessible, and their thyroid gland is highly sensitive to iodine status. A total goiter rate (TGR) of <5% in this age group signifies that iodine deficiency is no longer a public health problem in that community. **Analysis of Incorrect Options:** * **B. Urinary iodine levels among pregnant women:** While urinary iodine excretion (UIE) is the best indicator for **current/recent iodine intake** (as 90% of iodine is excreted in urine), it reflects short-term status rather than the long-term impact on community health. * **C. Neonatal hypothyroidism:** This is the most sensitive indicator for **environmental iodine deficiency** and reflects the status of the most vulnerable group (newborns), but it is not the primary tool for routine community impact monitoring. * **D. Iodine level in soil:** This is an environmental marker of the risk of deficiency in a geographical area but does not measure the biological impact on the human population. **High-Yield NEET-PG Pearls:** * **Most Sensitive Indicator:** Neonatal TSH levels (Neonatal Hypothyroidism). * **Best Indicator for Recent Intake:** Median Urinary Iodine Excretion (UIE). * **Target for Salt Iodization:** At least 95% of households should consume salt with an iodine content of $\geq$ 15 ppm. * **Iodine Levels in Salt:** 30 ppm at the production level and 15 ppm at the consumer level.

Q: Fish is deficient in which of the following nutrients?

Iron. ### Explanation Fish is considered a high-quality protein source in community medicine and nutrition, but it has specific nutritional gaps. **Why Iron is the Correct Answer:** While fish is an excellent source of complete proteins, essential fatty acids, and various minerals, it is **notoriously poor in Iron**. Most varieties of fish contain negligible amounts of iron compared to red meats or organ meats (like liver). In the context of the NEET-PG syllabus, fish is traditionally categorized as being deficient in **Iron, Vitamin C, and Carbohydrates**. **Analysis of Incorrect Options:** * **A. Iodine:** Marine fish (sea fish) are the richest natural sources of iodine. Consuming fish is a primary dietary strategy for preventing Iodine Deficiency Disorders (IDD). * **B. Vitamin A:** Fish liver oils (like Cod liver oil) are the richest natural sources of Vitamin A and Vitamin D. Even the flesh of fatty fish contains significant amounts of fat-soluble vitamins. * **C. Phosphorus:** Fish is a very rich source of phosphorus and calcium, especially if small fish are eaten with their bones. **High-Yield Clinical Pearls for NEET-PG:** * **Biological Value (BV):** Fish has a high biological value (approx. 80), making it an excellent source of essential amino acids. * **PUFA Content:** Fish is rich in Omega-3 fatty acids (EPA and DHA), which are cardioprotective as they lower serum triglycerides and VLDL. * **Fluorine:** Sea fish are also a significant source of Fluorine, which helps in preventing dental caries. * **The "Rule of Three":** Remember that fish is generally deficient in **Iron, Vitamin C, and Calcium** (unless bones are consumed). However, among the given options, Iron is the most classically cited deficiency.

Q: Which of the following has the highest percentage of polyunsaturated fatty acids?

Soya bean oil. **Explanation:** The question tests the knowledge of the fatty acid composition of common dietary fats. **Polyunsaturated Fatty Acids (PUFAs)** are fatty acids containing more than one double bond in their backbone (e.g., Linoleic acid and Linolenic acid). **Why Soya bean oil is correct:** Soya bean oil is highly rich in PUFAs, containing approximately **58–62%** (primarily Linoleic acid). Among the given options, it has the highest concentration of these heart-healthy fats, which are known to lower LDL cholesterol levels. **Analysis of Incorrect Options:** * **Margarine:** While often made from vegetable oils, the process of **hydrogenation** used to make it solid converts many unsaturated fats into saturated fats and trans-fats. Thus, its PUFA content is lower than liquid vegetable oils. * **Palm oil:** This is a "tropical oil" and is unique among plant oils for being very high in **saturated fatty acids** (~50%, mainly Palmitic acid). It has a relatively low PUFA content (~10%). * **Groundnut (Peanut) oil:** This oil is primarily rich in **Monounsaturated Fatty Acids (MUFAs)**, specifically Oleic acid (~45-50%). Its PUFA content is significant (~30%) but substantially lower than that of Soya bean oil. **High-Yield Clinical Pearls for NEET-PG:** * **Highest PUFA content:** Safflower oil (>70%) > Sunflower oil > Soya bean oil. * **Highest MUFA content:** Olive oil (highest) > Groundnut oil. * **Highest Saturated fat (Plant source):** Coconut oil (>90%). * **Essential Fatty Acids (EFA):** Linoleic (ω-6) and Linolenic (ω-3) acids are PUFAs that cannot be synthesized by the body and must be obtained from the diet. * **P:S Ratio:** A high Polyunsaturated to Saturated fat ratio is considered anti-atherogenic. Safflower and Soya bean oils have favorable P:S ratios.

Q: According to the WHO, what is the definition of abdominal obesity?

Waist-hip ratio > 0.85 in females. **Explanation:** The **Waist-Hip Ratio (WHR)** is a key anthropometric index used to measure abdominal (android) obesity, which is a significant risk factor for non-communicable diseases like Type 2 Diabetes and Cardiovascular diseases. **1. Why Option B is Correct:** According to the WHO technical report on "Waist Circumference and Waist-Hip Ratio," abdominal obesity is defined as a **WHR > 0.90 in men** and **> 0.85 in women**. These cut-off points are associated with a substantially increased risk of metabolic complications. In females, a ratio above 0.85 indicates a shift from a "pear-shaped" (gynoid) to an "apple-shaped" (android) fat distribution. **2. Analysis of Incorrect Options:** * **Option A (> 0.80):** While some older guidelines suggested 0.80 as a threshold for "increased risk," the WHO definitive cut-off for obesity-related metabolic risk is 0.85. * **Option C (> 0.90):** This is the WHO cut-off for **males**, not females. * **Option D (> 0.95):** This value exceeds the standard diagnostic criteria for both genders and represents a very high-risk category. **High-Yield Clinical Pearls for NEET-PG:** * **Waist Circumference (WC):** WHO also defines abdominal obesity based on WC alone: **> 102 cm in men** and **> 88 cm in women**. * **Asian/Indian Context:** The cut-offs are lower for Asians due to higher body fat percentages at lower BMIs. For Indians, abdominal obesity is often defined as **WC > 90 cm (men)** and **> 80 cm (women)**. * **Gold Standard:** While WHR is excellent for predicting mortality, Waist Circumference is often preferred in clinical practice as it is easier to measure accurately.

Q: Researchers studied the impact of an iodized salt program, particularly in hilly regions. What is the most sensitive indicator for monitoring environmental iodine deficiency?

Prevalence of neonatal hypothyroidism. **Explanation:** The correct answer is **B. Prevalence of neonatal hypothyroidism.** **Why it is the most sensitive indicator:** The developing fetal brain is highly sensitive to iodine deficiency. Neonatal hypothyroidism reflects the iodine status of the community in the most immediate and critical window. Since the thyroid hormone is essential for brain development, any deficiency in the environment manifests rapidly in newborns. Monitoring **Thyroid Stimulating Hormone (TSH)** levels in neonates (via heel-prick tests) is considered the most sensitive tool for tracking the impact of Iodine Deficiency Disorders (IDD) and the effectiveness of salt iodization programs in a population. **Analysis of Incorrect Options:** * **A. Prevalence of Goiter:** This is a traditional indicator used for long-term assessment. However, goiter is a **chronic** manifestation; it takes years to develop and years to regress even after iodine supplementation, making it insensitive to acute changes in environmental iodine. * **C. Prevalence of Myxedema:** This is a clinical end-stage of severe hypothyroidism. It is a late manifestation and lacks the sensitivity required for early monitoring of community-wide deficiency. * **D. Urinary Iodine Excretion (UIE):** While UIE is the best indicator for **current/recent dietary intake** of iodine, it is not as sensitive as neonatal hypothyroidism for assessing the functional impact of deficiency on the most vulnerable group (infants). **High-Yield NEET-PG Pearls:** * **Most sensitive indicator:** Neonatal hypothyroidism (TSH levels). * **Best indicator for current dietary intake:** Median Urinary Iodine Excretion. * **Indicator for long-term (chronic) status:** Prevalence of Goiter. * **Endemic Goiter definition:** When the prevalence of goiter in a community is **>5%**. * **Iodine content in salt:** 30 ppm at production level; 15 ppm at consumer level.

Q: Which of the following is NOT a feature of epidemic dropsy?

Convulsions. **Explanation:** Epidemic dropsy is a clinical condition caused by the ingestion of mustard oil contaminated with **Argemone mexicana** (prickly poppy) oil. The toxic alkaloids responsible are **Sanguinarine** and **Dihydrosanguinarine**, which interfere with cellular oxidative phosphorylation. **Why Convulsions is the correct answer:** Epidemic dropsy primarily affects the vascular system, leading to increased capillary permeability and dilatation. While it involves the cardiovascular, gastrointestinal, and ocular systems, it **does not typically involve the Central Nervous System (CNS)**. Therefore, neurological symptoms like convulsions are not a feature of this condition. **Analysis of other options:** * **Glaucoma (Option A):** This is a hallmark feature. Sanguinarine causes dilatation of the uveal tract capillaries, leading to increased aqueous humor production and **open-angle glaucoma**. * **Diarrhoea (Option B):** Gastrointestinal symptoms, including vomiting and diarrhoea, are often the earliest manifestations of the toxicity. * **Heart Failure (Option D):** The toxin causes extensive capillary leakage and peripheral vasodilatation, leading to high-output cardiac failure, which is a common cause of death in these patients. **High-Yield Clinical Pearls for NEET-PG:** * **Causative Agent:** Argemone mexicana (Sanguinarine toxin). * **Test for Detection:** **Nitric Acid Test** (turns orange-red) and **Paper Chromatography** (most sensitive). * **Key Clinical Triad:** Bilateral pitting edema (dropsy), Erythema/Pigmentation of skin, and Cardiac failure. * **Distinguishing Feature:** Unlike nutritional edema, epidemic dropsy is associated with **erythema** and **normal serum albumin** levels. * **Treatment:** No specific antidote; management is symptomatic (bed rest, high protein diet, and antioxidants).

Question 1

Primary prevention of obesity includes:

Accepted Answer

High fiber diet

Answer

Low fiber diet

Answer

High cholesterol diet

Answer

High intake of protein

Question 2

How many doses of vitamin A are required to treat deficiency?

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Question 3

What is the best indicator for monitoring the impact of the Iodine Deficiency Disorders Control programme?

Accepted Answer

Prevalence of goiter among school children

Answer

Urinary iodine levels among pregnant women

Answer

Neonatal hypothyroidism

Answer

Iodine level in soil

Question 4

Fish is deficient in which of the following nutrients?

Accepted Answer

Iron

Answer

Iodine

Answer

Vitamin A

Answer

Phosphorus

Question 5

Assessment of malnutrition is/are done by all except?

Accepted Answer

Total lymphocyte count

Answer

Hydroxyproline/creatinine ratio

Answer

Plasma/Amino acid ratio

Answer

Albumin concentration

Question 6

Which of the following has the highest percentage of polyunsaturated fatty acids?

Accepted Answer

Soya bean oil

Answer

Margarine

Answer

Palm oil

Answer

Ground nut oil

Question 7

According to the WHO, what is the definition of abdominal obesity?

Accepted Answer

Waist-hip ratio > 0.85 in females

Answer

Waist-hip ratio > 0.80 in females

Answer

Waist-hip ratio > 0.90 in females

Answer

Waist-hip ratio > 0.95 in females

Question 8

Researchers studied the impact of an iodized salt program, particularly in hilly regions. What is the most sensitive indicator for monitoring environmental iodine deficiency?

Accepted Answer

Prevalence of neonatal hypothyroidism

Answer

Prevalence of goiter

Answer

Prevalence of myxedema

Answer

Urinary iodine excretion

Question 9

Diagnostic criteria for acute severe malnutrition include all except?

Accepted Answer

Weight for height below 2 standard deviations of WHO Growth Standards 2006

Answer

Visible severe wasting

Answer

Mid-arm circumference below 115 mm

Answer

Bipedal edema

Question 10

Which of the following is NOT a feature of epidemic dropsy?

Accepted Answer

Convulsions

Answer

Glaucoma

Answer

Diarrhoea

Answer

Heart failure

Nutrition and Health — MCQs

Nutrition and Health — MCQs

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