Pediatric Nutrition Practice Questions

Q: What is the primary method for the prevention of neural tube defects in newborns?

Folic acid. **Explanation:** **Why Folic Acid is Correct:** Folic acid (Vitamin B9) is essential for DNA synthesis and methylation processes. During the first 28 days of gestation—often before a woman knows she is pregnant—the neural tube closes. A deficiency in folate impairs rapid cell division and tissue remodeling, leading to failure of the neural tube to fuse. This results in defects such as **Anencephaly** or **Spina Bifida**. Supplementation significantly reduces the incidence of these defects by ensuring adequate folate levels during this critical embryological window. **Why Other Options are Incorrect:** * **Iron:** Essential for preventing maternal anemia and ensuring fetal oxygenation, but it plays no role in the structural formation of the neural tube. * **Vitamin B6 (Pyridoxine):** Primarily used in pregnancy to manage nausea and vomiting (morning sickness); it does not prevent structural CNS defects. * **Vitamin B12 (Cobalamin):** While B12 deficiency can technically impair folate metabolism (the "folate trap"), it is not the primary clinical intervention used for the prevention of NTDs. **High-Yield Clinical Pearls for NEET-PG:** * **Ideal Timing:** Supplementation must begin **pre-conceptionally** (at least 1 month before) and continue through the first trimester. * **Standard Dose:** 400 mcg (0.4 mg) daily for low-risk pregnancies. * **High-Risk Dose:** 4 mg (4000 mcg) daily for women with a previous history of a child with NTD or those on anti-epileptic drugs (e.g., Valproate). * **Screening:** Elevated **Alpha-fetoprotein (AFP)** in maternal serum or amniotic fluid is a biochemical marker for open NTDs.

Q: One of the following is not reported to be a clinical manifestation of Zinc deficiency in children?

Macrocytic anaemia. **Explanation:** Zinc is an essential trace element required for the function of over 300 enzymes, including those involved in DNA synthesis, cell division, and protein metabolism. **Why Macrocytic Anaemia is the Correct Answer:** Zinc deficiency is **not** associated with macrocytic anaemia. Macrocytic anaemia is typically caused by deficiencies in Vitamin B12 or Folic acid. In contrast, zinc deficiency is more closely linked to impaired growth and immune dysfunction. While severe zinc deficiency can sometimes coexist with iron deficiency (leading to microcytic anaemia) in malabsorption syndromes, it does not independently cause macrocytic changes. **Analysis of Incorrect Options:** * **Dwarfism and Hypogonadism:** These are classic features of chronic zinc deficiency, famously described in the "Prasad syndrome." Zinc is vital for the growth hormone-IGF-1 axis and gonadal development. * **Liver and Spleen Enlargement:** Hepatosplenomegaly is a documented clinical finding in children with chronic zinc deficiency, often seen alongside growth retardation and geophagia (clay eating). * **Impaired Cell-Mediated Immunity:** Zinc is crucial for T-lymphocyte function and thymic hormone activity. Deficiency leads to lymphopenia, thymic atrophy, and increased susceptibility to infections (e.g., pneumonia and diarrhea). **High-Yield Clinical Pearls for NEET-PG:** * **Acrodermatitis Enteropathica:** An autosomal recessive disorder of zinc absorption characterized by the triad of **alopecia, diarrhea, and vesiculobullous dermatitis** (periorificial and acral). * **WHO Recommendation:** Zinc supplementation (20 mg/day for 10-14 days) is standard management for pediatric **diarrhea** to reduce severity and recurrence. * **Other signs:** Hypogeusia (decreased taste), impaired wound healing, and night blindness (zinc is a cofactor for Retinol dehydrogenase).

Q: All of the following statements are true regarding colostrum or breast milk except?

Vitamin D is the most abundant vitamin in breast milk.. **Explanation** The correct answer is **A** because it is a false statement. **Vitamin D is actually deficient in breast milk.** While breast milk is the "gold standard" for infant nutrition, it contains very low levels of Vitamin D (approx. 20-40 IU/L). Consequently, the WHO and IAP recommend routine Vitamin D supplementation (400 IU/day) for all breastfed infants to prevent rickets. The most abundant vitamin in breast milk is **Vitamin A**. **Analysis of other options:** * **Option B:** Taurine and Cysteine are essential amino acids for neonates (especially preterm) as they lack the enzymes to synthesize them. Taurine is critical for **brain development** and bile acid conjugation. * **Option C:** Human milk contains **higher Lactose** (7g% vs 4g% in cow's milk) which facilitates calcium absorption and brain growth. Although the absolute quantity of iron is low, its **bioavailability** is much higher (50-70%) compared to cow's milk. The **Calcium-Phosphate ratio** is higher in human milk (2:1), which prevents hypocalcemic tetany. * **Option D:** Colostrum is rich in **Secretory IgA**, which provides local mucosal immunity in the infant's gut against enteric pathogens. **High-Yield Clinical Pearls for NEET-PG:** * **Energy Value:** Breast milk provides **67 kcal/100 ml**. * **Proteins:** Human milk is **Whey-dominant** (60:40 ratio), making it easier to digest than the Casein-dominant cow's milk. * **Deficiencies:** Breast milk is notoriously deficient in **Vitamin D, Vitamin K, and Iron** (quantity-wise). * **Colostrum:** Secreted during the first 2-3 days; it is thick, yellow, and rich in fat-soluble vitamins (A, D, E, K) and antibodies.

Q: All of the following are seen in Rickets except –

Gunstock deformity. **Explanation:** The correct answer is **Gunstock deformity** (Cubitus varus). This deformity is a classic late complication of a **Supracondylar fracture of the humerus** in children, usually resulting from malunion. It is not a feature of Rickets. **Why the other options are seen in Rickets:** * **Bow legs (Genu varum):** Rickets causes defective mineralization of the osteoid matrix, leading to "soft" bones. When a child starts weight-bearing, the softened long bones of the lower limbs bend under gravity, resulting in bow legs. * **Pot belly:** This occurs due to generalized muscular hypotonia (low muscle tone) and weakness of the abdominal wall muscles, which is a systemic manifestation of Vitamin D deficiency. * **Craniotabes:** This is often the earliest clinical sign of Rickets (seen in infants <6 months). it refers to the softening of the skull bones (occipital and parietal), which give a "ping-pong ball" sensation upon pressure. **High-Yield Clinical Pearls for NEET-PG:** * **Radiological Signs of Rickets:** Cupping, fraying, and splaying of the metaphysis (best seen at the distal radius and ulna). * **Rachitic Rosary:** Palpable enlargement of the costochondral junctions (rounded beads). In contrast, **Scorbutic rosary** (Scurvy) is sharp/angular due to subluxation of the sternum. * **Harrison’s Sulcus:** A horizontal groove along the lower margin of the thorax at the insertion of the diaphragm. * **Biochemical profile:** Low/Normal Calcium, Low Phosphate, and **Elevated Alkaline Phosphatase (ALP)**—ALP is the most sensitive marker for disease activity.

Q: What is deficient in an exclusively breastfed baby?

Vitamin B12. **Explanation:** Breast milk is the gold standard for infant nutrition, providing almost all essential nutrients. However, it is notoriously low in certain specific elements, most notably **Vitamin B12**, Vitamin D, and Iron. **Why Vitamin B12 is the correct answer:** While breast milk contains some Vitamin B12, the levels are highly dependent on the mother's nutritional status. In the context of competitive exams like NEET-PG, Vitamin B12 is highlighted because **exclusive breastfeeding** (especially if the mother is a strict vegetarian or vegan) puts the infant at a high risk of megaloblastic anemia and neurological developmental delays. Among the options provided, B12 is the most clinically significant deficiency found in breast milk compared to the infant's requirements. **Analysis of Incorrect Options:** * **Vitamin A:** Breast milk (especially colostrum) is a rich source of Vitamin A, which is essential for immune function and ocular health. * **Vitamin C:** Breast milk contains adequate amounts of Vitamin C (ascorbic acid) to prevent scurvy; deficiency is usually only seen if the infant is fed boiled cow's milk. * **Proteins:** Breast milk contains the ideal quantity and quality of proteins (whey-to-casein ratio), perfectly tailored for an infant's growth and renal solute load. **High-Yield Clinical Pearls for NEET-PG:** * **The "Big Three" Deficiencies:** Breast milk is deficient in **Vitamin K** (given at birth to prevent HDN), **Vitamin D** (supplementation of 400 IU/day is recommended), and **Iron** (stores deplete by 4–6 months). * **Fluoride:** Breast milk is also low in Fluoride. * **B12 Deficiency Presentation:** Look for a clinical scenario involving a strictly vegetarian mother whose infant presents with hyperpigmentation of knuckles and developmental regression.

Q: A young patient presents with knee pain, irritability, and gum bleeding. Radiographs of the leg show significantly thin cortex with a white line at the metaphysis. What is the most likely diagnosis?

Scurvy. **Explanation:** The clinical presentation of irritability, bone pain (pseudoparalysis), and hemorrhagic manifestations like gum bleeding in a child is classic for **Scurvy (Vitamin C deficiency)**. Vitamin C is essential for collagen synthesis; its deficiency leads to capillary fragility and defective osteoid formation. **Why Scurvy is Correct:** The radiographic findings described are pathognomonic: * **White line of Fraenkel:** A dense, radiopaque line at the metaphysis representing a zone of well-calcified but poorly absorbed cartilage. * **Ground-glass appearance:** Due to a significantly thinned cortex and loss of trabecular markings. * **Other signs (not mentioned but relevant):** *Wimberger’s ring* (dense epiphysis rim), *Pelkan spur* (metaphyseal spurs), and *Trummerfeld zone* (scurvy line/lucent zone). **Why Other Options are Incorrect:** * **Rickets:** Presents with "cupping, splaying, and fraying" of the metaphysis and a *widened* osteoid plate, not a thin cortex with a white line. * **Fluorosis:** Characterized by increased bone density (osteosclerosis) and ligamentous calcification, rather than thinning of the cortex. * **Caffey’s Disease (Infantile Cortical Hyperostosis):** Presents with massive subperiosteal new bone formation (thickening) and irritability, typically involving the mandible, ribs, or clavicle. **NEET-PG High-Yield Pearls:** * **Early Sign:** Irritability and "Frog-leg position" due to subperiosteal hemorrhage pain. * **Earliest Radiographic Sign:** Rarefaction of the zone of provisional calcification. * **Key Pathology:** Failure of osteoid formation by osteoblasts. * **Clinical Triad:** Hyperkeratosis, Hemorrhage (corkscrew hair, petechiae), and Hematologic (anemia).

Question 1

What is the primary method for the prevention of neural tube defects in newborns?

Accepted Answer

Folic acid

Answer

Iron

Answer

Vitamin B6

Answer

Vitamin B12

Question 2

One of the following is not reported to be a clinical manifestation of Zinc deficiency in children?

Accepted Answer

Macrocytic anaemia

Answer

Dwarfism and hypogonadism

Answer

Liver and spleen enlargement

Answer

Impaired cell–mediated immunity

Question 3

All of the following statements are true regarding colostrum or breast milk except?

Accepted Answer

Vitamin D is the most abundant vitamin in breast milk.

Answer

Taurine is an amino acid present which is required for brain development.

Answer

In comparison to cow's milk, human breast milk has higher lactose, iron, and calcium-phosphate ratio.

Answer

IgA is present in high quantities in breast milk.

Question 4

What is true about breastfeeding?

Accepted Answer

It is best for both preterm and term infants.

Answer

About 50% of the energy is derived from protein.

Answer

It should be avoided for a day after a caesarean section.

Answer

It predisposes to necrotising enterocolitis.

Question 5

The protective effects of breast milk are known to be associated with which of the following?

Accepted Answer

IgA antibodies

Answer

IgM antibodies

Answer

Lysozyme

Answer

Mast cells

Question 6

Which of the following statements is TRUE with respect to a child with marasmus, EXCEPT?

Accepted Answer

The child is more prone to infection and has a higher mortality compared to kwashiorkor.

Answer

The child is severely wasted and has a skin-and-bone appearance with a 'monkey facies'.

Answer

The child appears apathetic and inactive.

Answer

The child's appetite is good.

Question 7

All of the following are seen in Rickets except –

Accepted Answer

Gunstock deformity

Answer

Bow legs

Answer

Pot belly

Answer

Craniotabes

Question 8

What is deficient in an exclusively breastfed baby?

Accepted Answer

Vitamin B12

Answer

Vitamin A

Answer

Vitamin C

Answer

Proteins

Question 9

A 1-month-old male child presented with multiple episodes of watery diarrhea, irritability, and a body rash. Examination revealed severe muscle wasting, alopecia, and a rash on the extremities, face, and perineum. What is the likely diagnosis?

Accepted Answer

Acrodermatitis enteropathica

Answer

Zinc deficiency

Answer

Kwashiorkor

Answer

Atopic dermatitis

Question 10

A young patient presents with knee pain, irritability, and gum bleeding. Radiographs of the leg show significantly thin cortex with a white line at the metaphysis. What is the most likely diagnosis?

Accepted Answer

Scurvy

Answer

Fluorosis

Answer

Rickets

Answer

Caffey's disease

Pediatric Nutrition — MCQs

Pediatric Nutrition — MCQs

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