Pediatric Nutrition — MCQs

Pediatric Nutrition Indian Medical PG Practice Questions and MCQs

Question 321: In rickets, which of the following is typically NOT seen?

A. Craniotabes
B. Increased acid phosphatase (Correct Answer)
C. Bow legs
D. Increased alkaline phosphatase

Explanation: In rickets, the fundamental pathology is a failure of mineralization of the osteoid matrix, usually due to Vitamin D deficiency. **Explanation of the Correct Answer:** * **B. Increased acid phosphatase:** This is the correct answer because acid phosphatase is a marker of **prostate tissue** or **lysosomal activity** (often elevated in Gaucher’s disease or prostatic carcinoma). It has no diagnostic role in rickets. In contrast, rickets is characterized by an increase in **Alkaline Phosphatase (ALP)**, which reflects compensatory osteoblastic activity attempting to mineralize the deficient bone matrix. **Explanation of Incorrect Options:** * **A. Craniotabes:** This is one of the earliest clinical signs of rickets (seen in infants <6 months). It refers to the softening of the skull bones, giving a "ping-pong ball" sensation upon pressure over the occipital or parietal bones. * **C. Bow legs (Genu Varum):** As the child begins to bear weight, the softened, unmineralized long bones of the lower limbs bend under gravity, leading to classic deformities like bow legs. * **D. Increased alkaline phosphatase:** This is the **earliest biochemical marker** of rickets. As osteoblasts work harder to lay down bone in a low-calcium/phosphate environment, they release high amounts of ALP into the serum. **High-Yield Clinical Pearls for NEET-PG:** * **Earliest Sign:** Craniotabes (Clinical); Increased ALP (Biochemical); Cupping/Splaying of metaphysis (Radiological). * **Harrison’s Groove:** A horizontal depression along the lower border of the chest due to the pull of the diaphragm on soft ribs. * **Rachitic Rosary:** Palpable (and visible) enlargement of the costochondral junctions. * **Biochemical Profile:** Low/Normal Calcium, Low Phosphate, **High ALP**, and High PTH (Secondary Hyperparathyroidism).

Question 322: Compared to artificially fed babies, breastfed babies have all the following benefits except?

A. Lower incidence of diarrhea episodes
B. Lower incidence of respiratory infections
C. Lower incidence of late-onset tetany
D. None of the above (Correct Answer)

Explanation: ### Explanation The correct answer is **D (None of the above)** because all the listed options (A, B, and C) are well-documented clinical benefits of breastfeeding over artificial (formula) feeding. **1. Lower incidence of diarrhea and respiratory infections (Options A & B):** Breast milk provides active immunological protection. It contains **Secretory IgA**, lysozymes, lactoferrin, and bifidus factor. These components inhibit the growth of pathogens like *E. coli* and *Rotavirus* in the gut and protect the mucosal lining of the respiratory tract. Furthermore, breastfeeding eliminates the risk of contamination associated with bottles and impure water used in formula preparation. **2. Lower incidence of late-onset tetany (Option C):** Late-onset neonatal tetany (hypocalcemia) is significantly more common in formula-fed infants. Cow’s milk has a much **higher phosphorus content** compared to breast milk. This high phosphate load leads to hyperphosphatemia, which suppressively lowers serum calcium levels, triggering tetany. Breast milk has an ideal Calcium:Phosphorus ratio (2:1), ensuring optimal absorption and mineral homeostasis. **High-Yield Clinical Pearls for NEET-PG:** * **Nutritional Superiority:** Breast milk has a higher whey-to-casein ratio (60:40) compared to cow’s milk (20:80), making it easier to digest. * **Iron Bioavailability:** Although breast milk has low iron absolute content, its **bioavailability is very high (50%)** compared to formula (4-7%). * **Cognitive Benefit:** Breast milk contains Long-Chain Polyunsaturated Fatty Acids (LC-PUFAs) like **DHA and ARA**, which are critical for retinal and brain development. * **Protective Effect:** Breastfeeding is associated with a reduced risk of SIDS, Type 1 Diabetes, and childhood obesity.

Question 323: For how long can breast milk be stored at room temperature?

A. 4 hours
B. 8 hours (Correct Answer)
C. 12 hours
D. 24 hours

Explanation: **Explanation:** The storage of breast milk is a high-yield topic in pediatric nutrition, focusing on maintaining the milk's immunological properties while preventing bacterial overgrowth. **Correct Answer: B. 8 hours** According to standard pediatric guidelines (including IAP and WHO), freshly expressed breast milk can be safely stored at **room temperature (up to 25°C) for 6 to 8 hours**. Breast milk contains potent bacteriostatic components (like lactoferrin and lysozymes) that inhibit the growth of pathogens, allowing it to remain stable longer than bovine milk. In tropical climates or warmer environments (>25°C), the shorter end of the spectrum (4 hours) is preferred, but 8 hours remains the standard academic answer for examinations. **Analysis of Incorrect Options:** * **A. 4 hours:** While 4 hours is the recommended limit for room temperature storage in very warm environments or for previously thawed milk, it is not the maximum limit for freshly expressed milk under standard conditions. * **C. 12 hours:** This exceeds the safety window. Beyond 8 hours at room temperature, the risk of bacterial contamination increases significantly, and the nutritional quality begins to degrade. * **D. 24 hours:** This is the duration for which breast milk can be stored in a **cool box with ice packs**. At room temperature, milk would spoil well before this time. **High-Yield Clinical Pearls for NEET-PG:** * **Refrigerator (4°C):** Safe for up to **24 hours** (some guidelines say up to 3-5 days, but 24 hours is the safest clinical benchmark for neonates). * **Freezer (-18 to -20°C):** Safe for **3 to 6 months**. * **Thawing:** Never microwave breast milk (destroys antibodies and creates "hot spots"). Thaw it overnight in the fridge or under running warm water. * **Colostrum:** High in IgA and lactoferrin; it is more stable than mature milk.

Question 324: A mother brought her 18-month-old boy to the pediatrician because he had not developed any teeth. Which of the following is LEAST likely to be an underlying cause for delayed dentition?

A. Pierre Robin sequence (Correct Answer)
B. Cleidocranial dysostosis
C. Rickets
D. Hypothyroidism

Explanation: **Explanation:** Delayed dentition is defined as the absence of any teeth by **13 months of age**. While several systemic and genetic conditions can delay tooth eruption, the **Pierre Robin sequence** is primarily a craniofacial anomaly characterized by a triad of micrognathia (small jaw), glossoptosis (downward displacement of the tongue), and airway obstruction (often with a cleft palate). It affects the **position and morphology** of the jaw rather than the timing of tooth eruption. **Why the other options are incorrect:** * **Cleidocranial dysostosis:** This is a classic cause of delayed dentition. It is characterized by supernumerary teeth, failure of eruption of permanent teeth, and absent/hypoplastic clavicles. * **Rickets:** Nutritional or vitamin D-resistant rickets is one of the most common systemic causes of delayed eruption and enamel hypoplasia due to impaired calcium-phosphate metabolism. * **Hypothyroidism:** Thyroid hormone is essential for skeletal and dental maturation. Congenital hypothyroidism is a high-yield cause of significantly delayed tooth eruption and "baby teeth" retention. **Clinical Pearls for NEET-PG:** * **First tooth to erupt:** Lower central incisor (usually at 6–10 months). * **Sequence of eruption:** Central Incisor → Lateral Incisor → First Molar → Canine → Second Molar. * **Rule of Thumb:** By 12 months, a child usually has 8 teeth; by 24 months, 16 teeth; and all 20 deciduous teeth by 30 months. * **Other causes of delayed dentition:** Down syndrome, Hypopituitarism, and Gardner syndrome.

Question 325: What is the recommended daily dosage of Vitamin A for children aged 1-3 years?

A. 500,000 IU
B. 200,000 IU (Correct Answer)
C. 100,000 IU
D. 300,000 IU

Explanation: **Explanation:** The correct answer is **200,000 IU**. This dosage is based on the **National Prophylaxis Programme against Nutritional Blindness**, which aims to prevent Vitamin A deficiency (VAD) and its complications, such as Xerophthalmia. **Why 200,000 IU is correct:** Under the current guidelines, Vitamin A supplementation begins at 9 months of age (along with the Measles/MR vaccine). * **First dose (9 months):** 100,000 IU (1 ml). * **Subsequent doses (1–5 years):** 200,000 IU (2 ml) administered every 6 months. Since the question asks for the dosage for children aged **1–3 years**, they fall into the category requiring the full 200,000 IU dose. A total of 9 doses are administered by age 5. **Analysis of Incorrect Options:** * **100,000 IU (Option C):** This is the specific dose for infants aged **6–12 months** (specifically the first dose at 9 months). Giving this to a 1–3 year old would be sub-therapeutic for prophylaxis. * **300,000 IU & 500,000 IU (Options D & A):** These dosages exceed the recommended prophylactic limits. Excessive Vitamin A intake can lead to **Hypervitaminosis A**, characterized by increased intracranial pressure (pseudotumor cerebri), vomiting, and skin desquamation. **High-Yield Clinical Pearls for NEET-PG:** * **Total Cumulative Dose:** A child receives a total of **17 lakh (1.7 million) IU** of Vitamin A by age 5. * **Treatment of Xerophthalmia:** If a child is symptomatic (e.g., Bitot’s spots), the treatment schedule is different: 200,000 IU on **Day 0, Day 1, and Day 14** (half dose if <1 year). * **Storage:** Vitamin A is stored in the **Ito cells** (Stellate cells) of the liver. * **Early Sign:** The earliest clinical sign of VAD is **Conjunctival Xerosis**, while the earliest symptom is **Night Blindness (Nyctalopia)**.

Question 326: What advice would you give to a mother with a protein allergy who wishes to breastfeed her infant?

A. Reassure her that breastfeeding will not transmit the allergy to the infant. (Correct Answer)
B. Advise her to consult her primary health care provider for guidance.
C. Recommend using formula milk to prevent potential allergies.
D. Suggest alternating between breast milk and formula to minimize allergen exposure.

Explanation: **Explanation:** The correct answer is **A: Reassure her that breastfeeding will not transmit the allergy to the infant.** **Medical Concept:** A mother’s food allergies (including protein allergies) are not genetically "transmitted" through breast milk. Breast milk is the gold standard for infant nutrition and contains immunomodulatory factors (like secretory IgA and TGF-β) that actually help in the maturation of the infant's gut mucosa and immune system. Exclusive breastfeeding for the first six months is one of the most effective strategies to **prevent** the development of atopic diseases and allergies in infants, even those with a strong family history. **Analysis of Incorrect Options:** * **Option B:** While consulting a provider is generally good advice, it does not address the clinical question. In the context of NEET-PG, the most direct physiological reassurance is the priority. * **Option C:** Formula milk, especially cow’s milk-based formula, is a significant risk factor for developing early-onset protein allergies (like Cow’s Milk Protein Allergy - CMPA). * **Option D:** Mixed feeding (breast milk + formula) increases the risk of sensitization to foreign proteins and undermines the protective benefits of exclusive breastfeeding. **High-Yield Clinical Pearls for NEET-PG:** * **Protective Effect:** Breastfeeding reduces the risk of asthma, eczema, and food allergies in the first two years of life. * **Maternal Diet:** A mother does not need to avoid allergens (like peanuts or eggs) during pregnancy or lactation to prevent allergies in the child unless she herself is allergic to them. * **CMPA Management:** If an infant develops Cow's Milk Protein Allergy while breastfeeding, the mother should eliminate dairy from *her* diet while continuing to breastfeed. * **Complementary Feeding:** Current guidelines suggest that delaying the introduction of allergenic foods beyond 6 months does not prevent allergies; timely introduction is now preferred.

Question 327: Which of the following is true about Vitamin D deficiency rickets?

A. Vitamin D3 given at a dose of 50–150 mg/day
B. X-ray of the knee joint is diagnostic (Correct Answer)
C. Rickety rosary is tender
D. Increased chances of respiratory tract infection

Explanation: **Explanation:** **Vitamin D deficiency rickets** is a metabolic bone disease characterized by the failure of osteoid mineralization at the growth plates. **Why Option B is Correct:** Radiology is the gold standard for diagnosing rickets. An **X-ray of the knee joint** (specifically the distal femur and proximal tibia/fibula) or the **wrist** (distal radius/ulna) is diagnostic because these are areas of rapid bone growth. Classic findings include **cupping, fraying, and splaying** of the metaphysis, along with widening of the growth plate. **Why Other Options are Incorrect:** * **Option A:** The therapeutic dose of Vitamin D3 is **3,000–6,000 IU/day** (or a single "Stoss" dose of 3–6 lakh IU). 50–150 mg is a massive overdose; 1 mg of Vitamin D equals 40,000 IU. * **Option C:** The **Rickety Rosary** (prominence of costochondral junctions) is **non-tender**. In contrast, the "Scorbutic Rosary" seen in Vitamin D deficiency (Scurvy) is typically tender and angular. * **Option D:** While Vitamin D has immunomodulatory roles, **increased respiratory tract infections** are more classically and strongly associated with **Vitamin A deficiency** (due to squamous metaplasia of respiratory epithelium). **High-Yield Clinical Pearls for NEET-PG:** * **Earliest Sign:** Craniotabes (softening of skull bones) is the earliest clinical sign, usually seen in infants <6 months. * **Biochemical Profile:** Low/Normal Calcium, **Low Phosphate**, and **Elevated Alkaline Phosphatase (ALP)**. Elevated ALP is the most sensitive biochemical marker for monitoring treatment response. * **Harrison’s Sulcus:** A groove along the lower border of the thorax caused by the pull of the diaphragm on soft ribs.

Question 328: Which of the following conditions can occur in an exclusively breastfed baby?

A. Jaundice (Correct Answer)
B. Scurvy
C. Tetany
D. Eczema

Explanation: ### Explanation **Correct Option: A. Jaundice** Exclusively breastfed infants are prone to two types of jaundice: 1. **Breastfeeding Jaundice (Early onset):** Occurs in the first week of life due to inadequate milk intake, leading to dehydration and increased enterohepatic circulation of bilirubin. 2. **Breast Milk Jaundice (Late onset):** Occurs after the first week (peaks at 2 weeks). It is attributed to substances in breast milk (like $\beta$-glucuronidase or pregnane-3$\alpha$, 20$\beta$-diol) that inhibit bilirubin conjugation or increase its reabsorption. **Why Incorrect Options are Wrong:** * **B. Scurvy:** Breast milk is a rich source of Vitamin C. Scurvy (Vitamin C deficiency) is typically seen in infants fed exclusively on boiled cow’s milk, as heat destroys the vitamin. * **C. Tetany:** Breast milk has an ideal Calcium to Phosphorus ratio (2:1). Tetany (hypocalcemia) is more common in infants fed cow’s milk, which has a high phosphorus load that leads to hyperphosphatemia and secondary hypocalcemia. * **D. Eczema:** Breast milk contains secretory IgA and immunomodulators that provide a protective effect against atopy and allergic conditions like eczema. Exclusive breastfeeding is recommended to *prevent* early-onset allergic diseases. **High-Yield Clinical Pearls for NEET-PG:** * **Vitamin Supplementation:** Breast milk is deficient in **Vitamin D** and **Vitamin K**. All exclusively breastfed infants should receive Vitamin D (400 IU/day) from birth. * **Iron:** While breast milk has low iron content, its **bioavailability** is very high (50%) compared to cow’s milk (10%). * **Breast Milk Jaundice:** Treatment usually involves continuing breastfeeding; interruption is rarely necessary unless bilirubin levels exceed 20 mg/dL.

Question 329: Breastfeeding is not contraindicated in which of the following maternal conditions?

A. Mother has active herpes infection on the breast
B. Mother has hepatitis B infection (Correct Answer)
C. Mother has active tuberculosis
D. Mother is on chemoprophylaxis for leukemia

Explanation: **Explanation:** In pediatric nutrition, distinguishing between absolute and relative contraindications to breastfeeding is a high-yield topic for NEET-PG. **Correct Option: B (Hepatitis B Infection)** Breastfeeding is **not contraindicated** in mothers with Hepatitis B (HBV). While HBV DNA can be found in breast milk, the risk of transmission via breastfeeding is negligible if the infant receives the standard post-exposure prophylaxis. The management protocol involves administering the **Hepatitis B vaccine and Hepatitis B Immunoglobulin (HBIG)** within 12 hours of birth. Once these are given, the mother can breastfeed safely. **Incorrect Options:** * **A (Active Herpes on the breast):** This is a contraindication because direct contact with herpetic lesions can transmit the virus to the neonate, potentially causing fatal neonatal herpes. Breastfeeding can resume once lesions have crusted over and healed. * **C (Active Tuberculosis):** If the mother has untreated, sputum-positive (infectious) TB, she should be separated from the infant to prevent respiratory droplet transmission. However, she can still provide **expressed breast milk**, as the TB bacilli do not pass through the milk. Breastfeeding is only resumed after the mother has been on AKT for at least 2 weeks and is non-infectious. * **D (Chemotherapy):** Cytotoxic drugs used in leukemia are excreted in breast milk and can cause severe adverse effects in the infant, including bone marrow suppression and growth interference. **High-Yield Clinical Pearls:** * **HIV:** In India (per WHO/NACO guidelines), breastfeeding is encouraged even in HIV-positive mothers if they are on ART, as the benefits of nutrition and immunity outweigh the risk of transmission in resource-limited settings. * **Galactosemia:** This is the only absolute **infant** contraindication to breastfeeding. * **Mastitis:** It is **not** a contraindication; in fact, continued breastfeeding/emptying the breast is part of the treatment.

Question 330: Keshan disease is caused by deficiency of which micronutrient?

A. Thiamine
B. Zinc
C. Selenium (Correct Answer)
D. Proteins

Explanation: **Explanation:** **Keshan disease** is a congestive cardiomyopathy primarily affecting children and young women. It is caused by a deficiency of **Selenium**, an essential trace element. Selenium is a vital component of the enzyme **glutathione peroxidase**, which protects myocardial cells from oxidative damage. In the absence of selenium, oxidative stress leads to myocardial necrosis and fibrosis. Interestingly, the disease often involves a co-factor, such as the Coxsackie B virus, which becomes more virulent in a selenium-deficient host. **Analysis of Incorrect Options:** * **Thiamine (Vitamin B1):** Deficiency leads to **Beriberi**. "Wet Beriberi" presents with high-output heart failure, but it is distinct from the dilated cardiomyopathy seen in Keshan disease. * **Zinc:** Deficiency typically presents as **Acrodermatitis enteropathica**, characterized by periorificial and acral dermatitis, alopecia, and diarrhea. * **Proteins:** Severe protein deficiency leads to **Kwashiorkor**, characterized by edema, "flaky paint" dermatosis, and "flag sign" hair changes, but not specific cardiomyopathy. **High-Yield Clinical Pearls for NEET-PG:** * **Kashin-Beck Disease:** Another selenium deficiency disorder characterized by osteoarthropathy (degeneration of joint cartilage). * **Selenium Toxicity (Selenosis):** Presents with a garlic-like breath odor, hair loss, and brittle nails. * **Glutathione Peroxidase:** The most important antioxidant enzyme containing selenium; it converts hydrogen peroxide into water. * **Total Parenteral Nutrition (TPN):** Long-term TPN without supplementation is a common modern cause of selenium deficiency.

Practice by Chapter

Breastfeeding

Practice Questions

Infant Formula Feeding

Practice Questions

Complementary Feeding

Practice Questions

Nutritional Requirements by Age

Practice Questions

Malnutrition and Failure to Thrive

Practice Questions

Obesity in Children

Practice Questions

Vitamin Deficiencies

Practice Questions

Mineral Deficiencies

Practice Questions

Food Allergies and Intolerances

Practice Questions

Nutritional Management of Chronic Diseases

Practice Questions

Eating Disorders

Practice Questions

Parenteral and Enteral Nutrition

Practice Questions

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