Nutrition and Health — MCQs

Nutrition and Health Indian Medical PG Practice Questions and MCQs

Question 381: Body mass index (BMI) is a ratio of body weight to:

A. Height
B. Square root of height
C. Square of height (Correct Answer)
D. Cube of height

Explanation: **Explanation:** Body Mass Index (BMI), also known as the **Quetelet Index**, is the most widely used anthropometric indicator to assess nutritional status in adults. It is defined as the weight in kilograms divided by the square of the height in meters. **Formula:** $BMI = \frac{\text{Weight (kg)}}{\text{Height (m)}^2}$ 1. **Why Option C is Correct:** The formula specifically utilizes the **square of the height** to normalize body weight for height across different body sizes. This mathematical relationship provides a better correlation with total body fat content than weight alone. 2. **Why Other Options are Incorrect:** * **Option A (Height):** Weight-for-height is a simple ratio but does not account for the non-linear relationship between body volume and height. * **Option B & D (Square root/Cube):** These are not used in the standard Quetelet Index. While the "Ponderal Index" uses the cube root of weight/height, it is not the standard for BMI. **High-Yield Clinical Pearls for NEET-PG:** * **WHO Classification for BMI:** * Underweight: < 18.5 * Normal: 18.5 – 24.9 * Overweight: 25.0 – 29.9 * Obese: ≥ 30.0 * **Asian-Indian Specific Criteria:** Due to higher visceral fat at lower BMIs, the cut-offs for Indians are lower: Overweight is **23–24.9** and Obesity is **≥ 25**. * **Limitation:** BMI does not distinguish between muscle mass and fat mass (e.g., an athlete may have a high BMI but low body fat). * **Best Indicator of Abdominal Obesity:** Waist-to-hip ratio (Significant if > 0.9 in men and > 0.85 in women).

Question 382: What is the best indicator for acute malnutrition?

A. Decrease in Weight/Height ratio (Correct Answer)
B. Decrease in Weight/Age ratio
C. Decrease in Height/Age ratio
D. None of the above

Explanation: In pediatric nutrition assessment, anthropometric indices are used to differentiate between various types of growth failure. ### **Why Weight-for-Height is the Correct Answer** **Weight-for-Height (W/H)** is the most sensitive indicator for **acute malnutrition (Wasting)**. Weight is a labile variable that responds quickly to recent nutritional deficits or acute illnesses (like diarrhea or pneumonia). When a child loses weight rapidly while their height remains relatively constant, the W/H ratio drops. This reflects a current, short-term state of starvation or disease. ### **Explanation of Incorrect Options** * **Weight-for-Age (W/A):** This is an indicator of **Underweight**. While commonly used in growth charts (e.g., IAP classification), it is a "composite indicator." It does not distinguish between a child who is thin (acute) and a child who is short (chronic). * **Height-for-Age (H/A):** This is the indicator for **Stunting**, which reflects **chronic (long-term) malnutrition**. Linear growth retardation occurs over a long period due to persistent nutritional deprivation or recurrent infections. ### **High-Yield Clinical Pearls for NEET-PG** * **Wasting (Acute):** Low Weight-for-Height. * **Stunting (Chronic):** Low Height-for-Age. * **Underweight (Acute + Chronic):** Low Weight-for-Age. * **Mid-Upper Arm Circumference (MUAC):** Used for rapid screening of Severe Acute Malnutrition (SAM) in children aged 6–59 months. A MUAC **<11.5 cm** indicates SAM. * **Quetelet Index:** Another name for Body Mass Index (BMI), used primarily in adults to assess nutritional status.

Question 383: It has recently been decided to fortify which of the following to reduce the prevalence of anemia, a strategy accepted by the Government of Pakistan?

A. Salt
B. Skimmed dried milk
C. Sugar
D. Flour (Correct Answer)

Explanation: **Explanation:** **Correct Option: D (Flour)** The Government of Pakistan, in collaboration with international agencies like the Global Alliance for Improved Nutrition (GAIN) and the World Food Programme (WFP), has implemented the **National Wheat Flour Fortification Program**. Wheat flour (Atta) is the most effective vehicle for fortification because it is a staple food consumed by the majority of the population across all socio-economic strata. To combat the high prevalence of Nutritional Anemia, flour is fortified with **Iron (as Ferrous Fumarate or Sodium Iron EDTA)**, **Folic Acid**, and **Vitamin B12**. **Analysis of Incorrect Options:** * **A. Salt:** While salt is the vehicle for **Iodine** (to prevent Iodine Deficiency Disorders), it is not the primary vehicle for iron fortification in the context of Pakistan’s national strategy for anemia, although "Double Fortified Salt" (Iron + Iodine) exists as a concept. * **B. Skimmed dried milk:** Milk is typically fortified with **Vitamin A and D**. While it contains minerals, it is not used as a mass-scale public health vehicle for iron due to cost and consumption patterns. * **C. Sugar:** Sugar fortification (usually with **Vitamin A**) has been implemented in some Latin American countries, but it is not a strategy used for anemia control in Pakistan. **High-Yield Clinical Pearls for NEET-PG:** * **Staple Food Fortification:** The most common vehicles globally are Wheat/Rice (Iron, B12, Folic acid) and Oil/Milk (Vitamins A & D). * **Iron Fortificant of Choice:** Sodium Iron EDTA is often preferred for wheat flour because it has better bioavailability and does not alter the color or taste of the *rotis*. * **Anemia in Pregnancy:** In India and neighboring regions, the **National Iron Plus Initiative (NIPI)** remains the gold standard, focusing on prophylactic Iron-Folic Acid (IFA) supplementation. * **Bio-fortification:** This refers to breeding crops (like Golden Rice for Vitamin A) to increase nutritional value, distinct from industrial fortification.

Question 384: Which of the following statements is true about net protein utilization?

A. It is the ratio of total nitrogen retained by total nitrogen intake, multiplied by 100. (Correct Answer)
B. If net protein utilization is high, the amount of protein required in the diet is low.
C. It is the ratio of energy from protein to total energy in the diet.
D. It is the amount of one amino acid per gram of a protein divided by the amount of the same amino acid per gram of egg protein.

Explanation: **Explanation** **Net Protein Utilization (NPU)** is a key indicator of protein quality that measures how much of the nitrogen ingested is actually retained by the body for growth and maintenance. 1. **Why Option A is Correct:** NPU is calculated as the **(Nitrogen Retained / Nitrogen Intake) × 100**. It accounts for both the digestibility of the protein and the efficiency with which the absorbed amino acids are utilized. Mathematically, it is the product of Biological Value (BV) and Digestibility Coefficient (DC) divided by 100. 2. **Analysis of Incorrect Options:** * **Option B:** This is a conceptual distractor. While a high NPU means the protein is of high quality, the *total* protein requirement in a diet is determined by physiological needs (age, pregnancy, illness). However, if NPU is low, one must consume *more* total protein to meet those needs. * **Option C:** This describes the **Protein-Energy Ratio (PE ratio)**, which measures the proportion of dietary energy derived from proteins. * **Option D:** This defines the **Amino Acid Score** (Chemical Score), which compares the limiting amino acid of a test protein to a reference protein (usually egg protein). **High-Yield Pearls for NEET-PG:** * **Reference Protein:** Egg protein is considered the "standard" or reference protein because it is fully utilized by the body (NPU = 100). * **NPU Values:** Egg (100), Milk (75), Meat (75), Soya (55), Dal/Pulses (45). * **Limiting Amino Acids:** Pulses are deficient in **Methionine**, while Cereals are deficient in **Lysine**. This is why a cereal-pulse combination (e.g., Khichdi) improves the overall NPU via "supplementary action of proteins."

Question 385: A 9-year-old child needs vitamin A prophylaxis. What is the recommended dose and route of administration?

A. 1,00,000 IU intramuscularly
B. 1,00,000 IU orally (Correct Answer)
C. 2,00,000 IU intramuscularly
D. 2,00,000 IU orally

Explanation: ### Explanation The correct answer is **B. 1,00,000 IU orally**. #### 1. Why Option B is Correct Under the **National Vitamin A Prophylaxis Programme** in India, the dosage is strictly age-dependent. For an infant aged **6 to 11 months**, the recommended dose is a single dose of **1,00,000 IU**. The route of administration for Vitamin A prophylaxis is always **oral** (usually administered as 1 ml of the syrup) because it is highly effective, safe, and cost-efficient for mass distribution. #### 2. Why Other Options are Wrong * **Option A & C (Intramuscularly):** Vitamin A prophylaxis is never given via the intramuscular route in public health programs. The oral route is preferred due to ease of administration and better compliance. * **Option D (2,00,000 IU orally):** This is the standard dose for children aged **1 to 5 years**. Since the child in the question is 9 months old, this dose would be too high and could lead to toxicity (hypervitaminosis A). #### 3. High-Yield Clinical Pearls for NEET-PG * **Schedule:** The 1st dose (1 lakh IU) is given at **9 months** (with Measles/MR vaccine). Subsequent doses (2 lakh IU) are given every 6 months until the age of 5 years. * **Total Doses:** A child receives a total of **9 doses** (1 + 8). * **Total Cumulative Dose:** 17,00,000 IU (17 Lakh IU). * **Treatment vs. Prophylaxis:** For treating clinical Xerophthalmia, the dose is 2,00,000 IU on days 0, 1, and 14 (except for infants <6 months who receive 50,000 IU). * **Target:** The program primarily targets children aged 6 months to 5 years to prevent nutritional blindness and reduce child mortality.

Question 386: Which amino acid is considered limiting in soybean?

A. Threonine
B. Lysine
C. Methionine (Correct Answer)
D. Tryptophan

Explanation: **Explanation:** The concept of a **limiting amino acid** refers to the essential amino acid present in the lowest amount relative to the body's requirements in a particular food source. It "limits" the utilization of other amino acids for protein synthesis. **Why Methionine is Correct:** Soybean is a high-quality plant protein (often called "poor man's meat") because it contains all essential amino acids. However, like most **legumes and pulses**, it is relatively deficient in sulfur-containing amino acids, specifically **Methionine** and Cysteine. To achieve a "complete protein" profile, pulses are typically consumed with cereals (like rice or wheat), which are rich in Methionine but deficient in Lysine. This is known as **supplementary action of proteins**. **Analysis of Incorrect Options:** * **A. Threonine:** This is the second limiting amino acid in some cereals (like rice), but it is not the primary limiting factor in soy. * **B. Lysine:** This is the characteristic limiting amino acid in **cereals** (wheat, rice, maize). Soybeans are actually very rich in Lysine, which is why they complement cereal-based diets so well. * **C. Tryptophan:** This is the limiting amino acid in **Maize** (along with Lysine). A deficiency of Tryptophan in a maize-dependent diet leads to Pellagra (due to decreased endogenous synthesis of Niacin). **High-Yield Clinical Pearls for NEET-PG:** * **Pulse/Cereal Ratio:** The ideal ratio for protein supplementation is **1:4** (1 part pulse to 4 parts cereal). * **Reference Protein:** Egg is considered the reference protein (Biological Value = 100) because it contains all essential amino acids in ideal proportions. * **Net Protein Utilization (NPU):** Egg (96) > Milk (75) > Meat (74) > Soy (61). * **Limiting Amino Acid Mnemonic:** * **P**ulses are low in **M**ethionine (**P-M**). * **C**ereals are low in **L**ysine (**C-L**).

Question 387: How much energy is present in 60 grams of egg?

A. 70 Kcal (Correct Answer)
B. 6 mg of calcium
C. 30 gm protein
D. 10 mg of iron

Explanation: **Explanation:** The standard reference for a "whole egg" in community medicine and nutrition is approximately **60 grams**. According to the ICMR (Indian Council of Medical Research) and standard food composition tables, one average-sized egg provides approximately **70 Kcal** of energy. **Breakdown of the Correct Answer (A):** An average 60g egg contains roughly 6g of fat (6 x 9 = 54 kcal) and 6g of protein (6 x 4 = 24 kcal). While the math suggests ~78 kcal, the standardized nutritional value used in medical exams for a medium-to-large egg is consistently **70 Kcal**. **Analysis of Incorrect Options:** * **B. 6 mg of calcium:** This is incorrect. An egg contains approximately **30 mg** of calcium. * **C. 30 gm protein:** This is significantly overestimated. A single egg provides about **6–7 grams** of high-quality protein. 30g would be equivalent to eating 5 eggs. * **D. 10 mg of iron:** This is incorrect. An egg contains roughly **1.0 to 1.5 mg** of iron, primarily located in the yolk. **High-Yield Clinical Pearls for NEET-PG:** * **Reference Protein:** Egg protein is considered the "Gold Standard" or **Reference Protein** because of its high biological value (94) and Net Protein Utilization (NPU). * **Biological Value (BV):** Egg has the highest BV (94) among all food sources, followed by milk (84) and fish (76). * **Limiting Amino Acids:** Eggs contain all essential amino acids in the right proportions; they are often used as the benchmark to calculate the **Chemical Score** of other proteins. * **Nutrient Distribution:** All the fat, cholesterol, and vitamins A, D, and E are found in the **yolk**, while the **white** (albumin) contains pure protein and B vitamins.

Question 388: Which of the following is NOT an indicator for the assessment of a nutritional program?

A. Weight and height of the preschool child
B. Prevalence of low birth weight (less than 2.5 kg) in the community
C. Nutritional assessment of the preschool child
D. Prevalence of pregnant mothers having Hb<11.5g% in the 3rd trimester (Correct Answer)

Explanation: ### Explanation The assessment of a nutritional program relies on standardized indicators that reflect the nutritional status of a community. The correct answer is **D** because it uses an incorrect diagnostic threshold for anemia in pregnancy. **1. Why Option D is the Correct Answer (The "NOT" Indicator):** According to the **WHO** and the **National Iron Plus Initiative (NIPI)** in India, anemia in pregnancy is defined as a Hemoglobin (Hb) level **<11.0 g/dL**. The value mentioned in the option (11.5 g/dL) is clinically incorrect for defining anemia in any trimester of pregnancy. Therefore, "Hb <11.5g%" cannot serve as a valid indicator for monitoring or evaluating a nutritional program. **2. Analysis of Other Options:** * **Option A & C:** The **preschool child (0-6 years)** is the primary target group for most nutritional interventions (like ICDS). Weight-for-age, height-for-age, and clinical nutritional assessments (checking for Bitot’s spots, marasmus, or kwashiorkor) are gold-standard impact indicators for these programs. * **Option B:** **Low Birth Weight (LBW)** is a proxy indicator for maternal nutritional status. A high prevalence of LBW (<2.5 kg) in a community indicates poor intrauterine nutrition and is a key outcome measure for maternal health programs. **3. High-Yield Clinical Pearls for NEET-PG:** * **Anemia Cut-offs (WHO):** * Pregnant Women: <11 g/dL * Non-pregnant Women (15+ yrs): <12 g/dL * Children (6–59 months): <11 g/dL * Men: <13 g/dL * **Direct Indicators of Nutritional Status:** Anthropometry (Weight, Height, MUAC), Biochemical tests (Serum Retinol, Hb), and Clinical signs. * **Indirect Indicators:** Vital statistics like IMR (Infant Mortality Rate) and prevalence of LBW. * **Reference:** Under the POSHAN Abhiyaan, the target is to reduce anemia among young children, adolescent girls, and women of reproductive age by **3% per annum**.

Question 389: What is the recommended daily intake of vitamin B per 100 kilocalories?

A. 0.05 mg (Correct Answer)
B. 0.5 mg
C. 5.0 mg
D. 1.0 gm

Explanation: **Explanation:** The correct answer is **0.05 mg**. This value specifically refers to the requirement of **Thiamine (Vitamin B1)** in relation to energy intake. **1. Why 0.05 mg is correct:** The requirement for Thiamine is directly linked to carbohydrate metabolism. Thiamine pyrophosphate (TPP) acts as a coenzyme for the pyruvate dehydrogenase complex, which bridges glycolysis and the TCA cycle. Because Thiamine is essential for energy production, the ICMR (Indian Council of Medical Research) and WHO recommend a dietary intake of **0.5 mg per 1000 kcal**. When calculated per **100 kcal**, this equals **0.05 mg**. **2. Why the other options are incorrect:** * **0.5 mg:** This is the requirement per **1000 kcal**, not 100 kcal. It is a common distractor in exams. * **5.0 mg:** This value is significantly higher than the physiological requirement for Thiamine. For context, the total daily RDA for an average sedentary adult male is approximately 1.4–1.7 mg/day. * **1.0 gm:** This is a massive dose (gram level) and would be toxic or pharmacologically irrelevant for daily nutritional requirements. **3. High-Yield Clinical Pearls for NEET-PG:** * **Thiamine (B1) Deficiency:** Leads to **Beriberi**. * *Dry Beriberi:* Polyneuritis and muscle wasting. * *Wet Beriberi:* High-output heart failure and edema. * *Wernicke-Korsakoff Syndrome:* Seen in chronic alcoholics (triad of ophthalmoplegia, ataxia, and confusion). * **Riboflavin (B2):** Requirement is also energy-linked, calculated at **0.6 mg per 1000 kcal**. * **Niacin (B3):** Requirement is **6.6 mg per 1000 kcal**. * **Cooking Loss:** Thiamine is heat-labile and easily destroyed by neutral or alkaline cooking water (e.g., adding baking soda to pulses).

Question 390: A 24-year-old primigravida weighing 57 kg with a hemoglobin of 11.0 gm% visits an antenatal clinic during the second trimester of pregnancy seeking advice on dietary intake. What additional caloric intake should she be advised?

A. Additional intake of 300 Kcal (Correct Answer)
B. Additional intake of 500 Kcal
C. Additional intake of 650 Kcal
D. No extra Kcal

Explanation: **Explanation:** The correct answer is **A (Additional intake of 300 Kcal)**. This recommendation is based on the **ICMR-NIN (2020) guidelines** for nutritional requirements during pregnancy in India. **1. Why Option A is Correct:** Energy requirements increase during pregnancy to support fetal growth, placental development, and maternal tissue expansion. According to the latest ICMR-NIN guidelines: * **First Trimester:** No additional calories are required (+0 Kcal). * **Second Trimester:** An additional **350 Kcal/day** is recommended. * **Third Trimester:** An additional **525 Kcal/day** is recommended. *Note:* While the latest 2020 guidelines specify +350 Kcal for the 2nd trimester, many standard textbooks and older exam patterns still follow the rounded figure of **+300 Kcal/day** as the standard "average" additional requirement for a pregnant woman. In the context of the given options, 300 Kcal is the most appropriate choice. **2. Why Other Options are Incorrect:** * **Option B (+500 Kcal):** This is closer to the requirement for the **third trimester** (+525 Kcal) or the first six months of **lactation** (+600 Kcal). * **Option C (+650 Kcal):** This exceeds the requirements for any stage of pregnancy. * **Option D (No extra Kcal):** This only applies to the **first trimester**, where fetal growth is minimal in terms of mass. **3. High-Yield Clinical Pearls for NEET-PG:** * **Lactation Requirements (ICMR 2020):** 0–6 months: **+600 Kcal/day**; 6–12 months: **+520 Kcal/day**. * **Protein Requirements:** Pregnancy requires an additional **+9.5 g/day** (2nd trimester) and **+22.0 g/day** (3rd trimester). * **Iron & Folic Acid (IFA):** Under the *Anemia Mukt Bharat* strategy, pregnant women should receive 60 mg elemental iron and 500 µg folic acid daily for 180 days.

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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