Nutrition and Health — MCQs

Nutrition and Health Indian Medical PG Practice Questions and MCQs

Question 351: What is a medium-term intervention for Vitamin A prophylaxis?

A. Measles immunization
B. Vitamin A supplementation
C. Fortification of food (Correct Answer)
D. Green leafy vegetables

Explanation: **Explanation:** The prevention and control of Vitamin A Deficiency (VAD) are categorized based on the duration and sustainability of the intervention. **1. Why Fortification is the Correct Answer:** **Fortification of food** (e.g., adding Vitamin A to sugar, salt, or milk) is considered a **medium-term intervention**. It aims to bridge the gap between immediate clinical supplementation and long-term dietary changes. It is cost-effective, reaches a large population through existing supply chains, and does not require active participation or behavioral changes from the consumer. **2. Analysis of Incorrect Options:** * **Vitamin A Supplementation (Option B):** This is a **short-term intervention**. It involves the periodic administration of high-dose Vitamin A (e.g., 2 lakh IU every 6 months for children) to provide immediate protection against xerophthalmia. * **Green Leafy Vegetables (Option D):** Promoting the intake of Vitamin A-rich foods (dietary diversification) is a **long-term intervention**. While it is the most sustainable and natural method, it requires significant time for nutritional education and behavioral change. * **Measles Immunization (Option A):** This is a **supportive/indirect measure**. Measles significantly depletes Vitamin A stores; therefore, immunization reduces the incidence of VAD-related complications but is not classified by duration in the same hierarchy as the others. **3. NEET-PG High-Yield Pearls:** * **Short-term:** Periodic massive dose supplementation (National Prophylaxis Programme). * **Medium-term:** Fortification of common foodstuffs. * **Long-term:** Dietary diversification and kitchen gardening. * **WHO Schedule:** 1st dose (1 lakh IU) at 9 months with Measles vaccine; subsequent doses (2 lakh IU) every 6 months up to age 5 (Total 9 doses/17 lakh IU).

Question 352: What is the recommended daily iodine requirement during pregnancy and lactation?

A. 90 mcg
B. 120 mcg
C. 150 mcg
D. 250 mcg (Correct Answer)

Explanation: **Explanation:** The correct answer is **250 mcg**. This recommendation aligns with the guidelines set by the World Health Organization (WHO) and UNICEF for pregnant and lactating women. **1. Why 250 mcg is correct:** During pregnancy, iodine requirements increase significantly due to: * Increased maternal thyroid hormone production to maintain euthyroidism. * Transfer of iodine to the fetus for the development of the fetal thyroid gland (starting around the 12th week). * Increased glomerular filtration rate (GFR), leading to higher urinary iodine excretion. During lactation, the mother must supply iodine through breast milk to support the infant’s rapid brain development. **2. Analysis of Incorrect Options:** * **90 mcg (Option A):** This is the recommended daily intake for preschool children (0 to 59 months). * **120 mcg (Option B):** This is the requirement for school-age children (6 to 12 years). * **150 mcg (Option C):** This is the standard daily requirement for adolescents and non-pregnant adults. **3. High-Yield Clinical Pearls for NEET-PG:** * **Iodine Deficiency Disorders (IDD):** The most critical consequence of maternal iodine deficiency is **Cretinism** (characterized by mental retardation, deaf-mutism, and spastic diplegia). * **Indicator of Choice:** The best indicator for monitoring iodine status in a **population** is Median Urinary Iodine Excretion (MUIE). For pregnant women, an MUIE of 150–249 μg/L indicates adequate intake. * **Salt Iodization:** Under the National Iodine Deficiency Disorders Control Programme (NIDDCP), salt must contain **30 ppm** of iodine at the production level and **15 ppm** at the consumer level. * **Goiter Rate:** A community is said to have endemic goiter if the Total Goiter Rate (TGR) is **>5%** in primary school children.

Question 353: What is the expenditure required for a daily calorie intake of in rural areas as per poverty lines?

A. 2200 calories
B. 2400 calories (Correct Answer)
C. 2100 calories
D. 2300 calories

Explanation: ### Explanation The concept of the "Poverty Line" in India was traditionally defined by the **Planning Commission** (now NITI Aayog) based on the minimum daily calorie requirement necessary for survival and physical work. **1. Why 2400 calories is correct:** In **rural areas**, the poverty line is pegged at an intake of **2400 kcal per person per day**. This higher requirement accounts for the fact that rural populations are predominantly engaged in heavy manual labor and agricultural activities, necessitating greater energy expenditure compared to their urban counterparts. **2. Analysis of Incorrect Options:** * **2100 calories (Option C):** This is the threshold for **urban areas**. Urban populations are assumed to have a more sedentary lifestyle or engage in less physically demanding labor, thus requiring fewer calories to maintain basic health. * **2200 and 2300 calories (Options A & D):** These figures do not correspond to any official poverty line benchmarks in the Indian context. While individual requirements vary, they are not used as standardized metrics for national economic surveys. **3. High-Yield Clinical Pearls for NEET-PG:** * **Task Force:** The calorie-based poverty line was famously recommended by the **Alagh Committee (1979)** and later reaffirmed by the **Lakdawala Committee**. * **Reference Indian Adult:** For nutritional planning (ICMR-NIN 2020), the reference weight is **65 kg for males** and **55 kg for females**. * **Energy Distribution:** In a balanced diet, carbohydrates should provide 50-60% of total calories, proteins 10-15%, and fats 20-30%. * **Net Protein Utilization (NPU):** For the Indian diet, the NPU is generally considered to be around **65**.

Question 354: What is the additional daily energy requirement for a lactating woman during the first six months?

A. 350 K calories
B. 450 K calories
C. 550 K calories
D. 600 K calories (Correct Answer)

Explanation: **Explanation:** The energy requirement of a lactating woman is significantly higher than that of a non-pregnant, non-lactating woman to support the production of breast milk. According to the **ICMR-NIN (2020) guidelines**, the additional energy requirement is calculated based on the energy content of milk secreted and the efficiency of converting maternal energy into milk. * **Why D is correct:** During the first six months of lactation (0–6 months), the average milk output is approximately 750–800 ml/day. To sustain this, an additional **600 kcal/day** is required. This ensures the mother does not deplete her own nutritional stores while providing adequate nutrition to the infant. * **Why A is incorrect:** **350 kcal/day** is the additional energy requirement for a **pregnant woman** during the second trimester (and 450 kcal/day during the third trimester). * **Why B & C are incorrect:** While 450–550 kcal were values cited in older guidelines or for the second six months of lactation (6–12 months), the current ICMR standard specifically mandates **+600 kcal** for the exclusive breastfeeding period (0–6 months) and **+520 kcal** for 6–12 months. **High-Yield Pearls for NEET-PG:** 1. **Lactation (0-6 months):** +600 kcal/day. 2. **Lactation (6-12 months):** +520 kcal/day. 3. **Pregnancy:** 1st Trimester (0), 2nd Trimester (+350 kcal), 3rd Trimester (+450 kcal). 4. **Protein Requirement:** An additional **+17 g/day** is needed during the first six months of lactation (ICMR 2020). 5. **Exclusive Breastfeeding:** Recommended for the first 6 months to reduce infant mortality and morbidity.

Question 355: What is the Body Mass Index (BMI) range for an underweight individual?

A. Less than 18.5 (Correct Answer)
B. 18.5-24.9
C. 25-29.9
D. More than 30

Explanation: **Explanation:** Body Mass Index (BMI), or Quetelet’s Index, is a simple anthropometric measure calculated as weight in kilograms divided by the square of height in meters ($kg/m^2$). It is the most widely used screening tool to categorize nutritional status in adults. **Why Option A is Correct:** According to the World Health Organization (WHO) classification, a BMI of **less than 18.5 $kg/m^2$** is defined as **Underweight**. This range indicates chronic energy deficiency and is associated with increased risks of infections, osteoporosis, and micronutrient deficiencies. **Analysis of Incorrect Options:** * **Option B (18.5–24.9 $kg/m^2$):** This is the **Normal (Healthy)** range for the general global population. * **Option C (25.0–29.9 $kg/m^2$):** This range is classified as **Pre-obese (Overweight)**. * **Option D (More than 30 $kg/m^2$):** This defines **Obesity** (Class I: 30–34.9; Class II: 35–39.9; Class III: $\ge$ 40). **High-Yield Clinical Pearls for NEET-PG:** 1. **Asian-Indian Specific Criteria:** Due to a higher risk of metabolic syndrome at lower BMIs, the classification for Indians is stricter: * Normal: 18.5–22.9 $kg/m^2$ * Overweight: 23.0–24.9 $kg/m^2$ * Obese: $\ge$ 25 $kg/m^2$ 2. **Ponderal Index:** Calculated as $Weight (kg) / Height (m)^3$. It is considered more sensitive than BMI for certain neonatal assessments. 3. **Limitations:** BMI does not distinguish between muscle mass and body fat; therefore, it may misclassify athletes or individuals with edema.

Question 356: Which of the following contains the highest amount of protein?

A. Soya beans (Correct Answer)
B. Ground nut
C. Bengal gram
D. Mysore dhal

Explanation: **Explanation:** The correct answer is **Soya beans**. In the context of human nutrition, protein content is measured as the amount of protein per 100 grams of the food item. 1. **Soya beans (43.2g/100g):** Soya beans are the richest plant-based source of protein. They are unique because they contain "complete protein," providing all essential amino acids in sufficient quantities, making them a high-biological value vegetable protein. 2. **Ground nut (25.3g/100g):** While groundnuts are an excellent source of proteins and fats (40.1%), their protein content is significantly lower than that of soya beans. 3. **Bengal gram (17.1g/100g):** Also known as Chickpea, it is a staple pulse but ranks lower in protein concentration compared to both soya and groundnuts. 4. **Mysore dhal (25.1g/100g):** Red lentils (Masoor dal) have a protein profile similar to groundnuts but fall short of the high concentration found in soya. **High-Yield NEET-PG Pearls:** * **Protein Reference:** The "Reference Protein" used for comparison in nutrition is **Egg** (Biological Value = 94), as it contains all essential amino acids in the most ideal proportions. * **Limiting Amino Acids:** Most pulses (like Bengal gram and Mysore dhal) are deficient in **Methionine** but rich in Lysine. Cereals are deficient in **Lysine** but rich in Methionine. This is why a cereal-pulse combination (e.g., Khichdi) provides a complete amino acid profile. * **Net Protein Utilization (NPU):** While soya has the highest quantity, its NPU (approx. 71) is lower than that of milk (75) or eggs (94).

Question 357: Protein efficiency ratio is defined as:

A. Gain in weight per unit of protein consumed. (Correct Answer)
B. Product of digestibility coefficient and biological value divided by 100.
C. Percentage of nitrogen retained out of the nitrogen absorbed.
D. Percentage of protein absorbed after digestion.

Explanation: **Explanation:** **Protein Efficiency Ratio (PER)** is a measure of protein quality based on the weight gain of a growing animal (usually rats) compared to its protein intake [1]. It is mathematically expressed as: $\text{PER} = \frac{\text{Gain in body weight (grams)}}{\text{Protein intake (grams)}}$ This index reflects the capacity of a protein to support growth, making **Option A** the correct definition [1]. **Analysis of Incorrect Options:** * **Option B:** This describes **Net Protein Utilization (NPU)**. It is calculated as $\frac{\text{Digestibility Coefficient} \times \text{Biological Value}}{100}$. NPU is considered a better indicator of protein quality than Biological Value alone as it accounts for digestibility. * **Option C:** This defines **Biological Value (BV)**. It measures the proportion of absorbed nitrogen that is retained by the body for maintenance and growth. * **Option D:** This refers to the **Digestibility Coefficient**, which is the percentage of ingested nitrogen that is absorbed into the bloodstream. **High-Yield Clinical Pearls for NEET-PG:** * **Reference Protein:** Egg protein is considered the "standard" or "reference protein" because it has a Biological Value and NPU of 100. * **Limiting Amino Acids:** Pulses are deficient in **Methionine**, while Cereals are deficient in **Lysine**. This is why a cereal-pulse combination (e.g., Khichdi) provides better protein quality (Mutual Supplementation). * **Net Dietary Protein Calories % (NDpCal%):** For a balanced diet, it should be >5% [1]. For an infant, it should be >8% [1]. * **Safe Intake:** The current RDA for an average Indian adult is **0.83 g/kg body weight/day** of protein.

Question 358: Serum retinol below which level is considered to be an indicator for xerophthalmia?

A. 1 mcg/dl
B. 5 mcg/dl
C. 10 mcg/dl (Correct Answer)
D. None of the above

Explanation: ### Explanation **1. Understanding the Correct Answer (C: 10 mcg/dl)** Vitamin A (Retinol) is essential for maintaining the integrity of epithelial tissues and the visual cycle. According to WHO criteria, **Serum Retinol levels < 10 mcg/dl (or < 0.35 µmol/L)** are considered a "biochemical deficiency" and a significant indicator of Vitamin A deficiency (VAD) at the community level. At this critically low level, the body's liver stores are exhausted, leading to clinical manifestations of **Xerophthalmia**, starting with night blindness (Nyctalopia). **2. Analysis of Incorrect Options** * **Option A (1 mcg/dl):** This level is incompatibly low with life/normal physiological function and does not represent a standard diagnostic cutoff. * **Option B (5 mcg/dl):** While this indicates severe deficiency, it is not the standard epidemiological threshold used to define the risk of xerophthalmia in a population. * **Normal Range:** For context, normal serum retinol levels range between **30–70 mcg/dl**. Levels between **10–20 mcg/dl** are considered "low" or "subclinical deficiency." **3. High-Yield Clinical Pearls for NEET-PG** * **Earliest Clinical Sign:** Conjunctival Xerosis. * **Earliest Symptom:** Night Blindness (XN). * **Pathognomonic Sign:** Bitot’s Spots (X1B) – triangular, foamy patches on the bulbar conjunctiva. * **WHO Classification (Modified):** * X1A: Conjunctival Xerosis * X1B: Bitot’s Spots * X2: Corneal Xerosis * X3A/X3B: Corneal Ulceration/Keratomalacia * XS: Corneal Scar * XF: Xerophthalmic Fundus * **Public Health Significance:** A prevalence of Bitot’s spots **> 0.5%** in children aged 6–71 months indicates a public health problem. * **Prophylaxis:** Under the National Vitamin A Prophylaxis Program, a total of **9 doses** are given until 5 years of age (1st dose: 1 lakh IU at 9 months with Measles vaccine; subsequent doses: 2 lakh IU every 6 months).

Question 359: Which component is present in a higher concentration in cow's milk compared to buffalo milk?

A. Fat
B. Protein
C. Water (Correct Answer)
D. Calcium

Explanation: **Explanation:** The nutritional composition of milk varies significantly between species. The correct answer is **Water** because cow’s milk has a higher moisture content (approximately **87.5%**) compared to buffalo milk (approximately **81%**). This makes buffalo milk more concentrated and viscous. **Why the other options are incorrect:** * **Fat:** Buffalo milk is significantly richer in fat (approx. 6–8%) compared to cow’s milk (approx. 3.5–4%). This high fat content makes buffalo milk the preferred choice for producing ghee and butter. * **Protein:** Buffalo milk contains more total protein (casein and whey) than cow’s milk. However, cow’s milk has a higher proportion of lactalbumin and lactoglobulin, making it slightly easier to digest for infants. * **Calcium:** Buffalo milk is a richer source of minerals, containing higher levels of calcium, phosphorus, and magnesium than cow’s milk. **High-Yield Clinical Pearls for NEET-PG:** * **Vitamin A:** Buffalo milk is white because it contains **Vitamin A** as a colorless precursor, whereas cow’s milk has a yellowish tinge due to the presence of **Beta-carotene**. * **Iron:** Both cow and buffalo milk are notoriously **poor sources of Iron**. * **Digestibility:** Cow’s milk is considered more easily digestible due to smaller fat globules and a lower curd tension. * **Energy Value:** Buffalo milk provides more calories (approx. 100 kcal/100g) than cow’s milk (approx. 67 kcal/100g) due to its higher fat content.

Question 360: Which of the following legumes has the lowest protein content?

A. Bengal gram (Correct Answer)
B. Black gram
C. Green gram
D. Red gram

Explanation: **Explanation:** In the context of Community Medicine and Nutrition, pulses (legumes) are vital sources of vegetable protein, typically containing **20–25% protein**. While all the options listed are common Indian pulses, they differ slightly in their macronutrient composition. **1. Why Bengal Gram is the Correct Answer:** Among the common pulses, **Bengal gram (Chana)** has the relatively lowest protein content, approximately **17.1g to 20.8g per 100g** (depending on the variety and processing). While it is highly nutritious and rich in fiber, its protein percentage is statistically lower than that of its counterparts like Green gram or Black gram. **2. Analysis of Incorrect Options:** * **Black gram (Urad dal):** Contains approximately **24g** of protein per 100g. It is one of the richest sources of phosphoric acid. * **Green gram (Moong dal):** Contains approximately **24–25g** of protein per 100g. It is highly digestible and often recommended for therapeutic diets. * **Red gram (Arhar/Tur dal):** Contains approximately **22.3g** of protein per 100g. It is a staple pulse in the Indian diet. **3. High-Yield Clinical Pearls for NEET-PG:** * **Limiting Amino Acid:** Pulses are generally deficient in **Methionine** (sulfur-containing amino acids) but rich in **Lysine**. * **Mutual Supplementation:** Cereals are deficient in Lysine but rich in Methionine. Therefore, a cereal-pulse combination (e.g., Khichdi) provides a **complete protein** profile (High Biological Value). * **Highest Protein Source:** Among all plant sources, **Soybean** contains the highest protein content (~40–43%). * **Lathyrism:** Excessive consumption of *Khesari dal* (Lathyrus sativus) leads to Neurolathyrism due to the toxin **BOAA** (Beta-oxalyl-amino-alanine).

Practice by Chapter

Basic Nutritional Requirements

Practice Questions

Assessment of Nutritional Status

Practice Questions

Protein-Energy Malnutrition

Practice Questions

Micronutrient Deficiencies

Practice Questions

Nutritional Programs in India

Practice Questions

Dietary Guidelines

Practice Questions

Food Safety and Security

Practice Questions

Diet and Non-Communicable Diseases

Practice Questions

Nutrition in Pregnancy and Lactation

Practice Questions

Infant and Young Child Nutrition

Practice Questions

Nutrition in Emergencies

Practice Questions

Food Fortification and Supplementation

Practice Questions

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