Nutrition and Health — MCQs

Nutrition and Health Indian Medical PG Practice Questions and MCQs

Question 281: What is the normal range for body mass index (BMI)?

A. 18.5 to 24.99 (Correct Answer)
B. 15 to 18
C. 25.00 to 29.99
D. Greater than 30

Explanation: **Explanation:** Body Mass Index (BMI), also known as Quetelet’s Index, is a simple anthropometric measure used to classify nutritional status in adults. It is calculated as weight in kilograms divided by the square of height in meters ($kg/m^2$). **Why Option A is Correct:** According to the World Health Organization (WHO) classification, a BMI range of **18.5 to 24.99 $kg/m^2$** is defined as **Normal (Healthy weight)**. This range is associated with the lowest risk of developing chronic non-communicable diseases like Type 2 Diabetes and Cardiovascular diseases. **Analysis of Incorrect Options:** * **Option B (15 to 18):** This falls under the category of **Underweight**. Specifically, a BMI <16 is severe thinness, 16–16.99 is moderate thinness, and 17–18.49 is mild thinness. * **Option C (25.00 to 29.99):** This range is classified as **Pre-obese (Overweight)**. Individuals in this category have an increased risk of metabolic complications. * **Option D (Greater than 30):** This defines **Obesity**. It is further subdivided into Class I (30–34.99), Class II (35–39.99), and Class III (≥40). **High-Yield Clinical Pearls for NEET-PG:** 1. **Asian-Indian Specific Guidelines:** Due to a higher risk of abdominal obesity and metabolic syndrome at lower BMIs, the criteria for Indians are revised: * Normal: 18.5–22.9 $kg/m^2$ * Overweight: 23–24.9 $kg/m^2$ * Obese: ≥25 $kg/m^2$ 2. **Ponderal Index:** Another measure of leaness ($Weight/Height^3$). 3. **Broca’s Index:** A quick bedside formula for Ideal Weight: $Height (cm) - 100$.

Question 282: Which of the following is NOT an example of food fortification?

A. Addition of color to saccharin (Correct Answer)
B. Addition of Vitamin A to foodstuffs
C. Addition of extra nutrients to foodstuffs
D. Iodization of salt

Explanation: ### Explanation **Concept of Food Fortification** Food fortification is the process of adding essential micronutrients (vitamins and minerals) to food to improve its nutritional quality and provide a public health benefit with minimal risk to health. The primary goal is to prevent or correct a demonstrated deficiency of one or more nutrients in the general population or specific groups. **Why Option A is Correct** **Addition of color to saccharin** is not fortification; it is a regulatory requirement for safety and identification. Saccharin is an artificial sweetener, not a staple food. Adding color to it serves as a "marker" to distinguish it from sugar or to prevent its misuse in certain food products. It does not enhance the nutritional value of the population. **Why the Other Options are Incorrect** * **Option B (Addition of Vitamin A):** This is a classic example of fortification (e.g., adding Vitamin A to vanaspati ghee or milk) to combat xerophthalmia and night blindness. * **Option C (Addition of extra nutrients):** This is the literal definition of fortification, where nutrients are added to staple foods (like iron to flour) to address widespread deficiencies. * **Option D (Iodization of salt):** This is the most successful and widely recognized fortification program globally, aimed at eliminating Iodine Deficiency Disorders (IDD) like goiter and cretinism. **High-Yield Clinical Pearls for NEET-PG** * **Fortification vs. Enrichment:** Fortification adds nutrients that may not have been present originally, while **Enrichment** replaces nutrients lost during processing (e.g., adding B-vitamins back to polished rice). * **Double Fortified Salt (DFS):** Contains both **Iodine and Iron** (used to combat anemia and IDD simultaneously). * **Golden Rice:** A genetically modified crop fortified with **Beta-carotene** (Vitamin A precursor). * **FSSAI Logo:** Look for the **+F logo** on food packets in India, which signifies that the food is fortified according to government standards.

Question 283: What is considered the best natural source of iodine?

A. Milk
B. Sea foods (Correct Answer)
C. Salt
D. Green leafy vegetables

Explanation: **Explanation:** The correct answer is **Sea foods**. Iodine is a trace element essential for the synthesis of thyroid hormones (T3 and T4). The primary reservoir of iodine is the ocean, where it exists as iodide. Marine organisms, including **sea fish (like cod and haddock), shellfish, and seaweed**, bioaccumulate this iodine from seawater, making them the richest and best **natural** sources. **Analysis of Options:** * **A. Milk:** While dairy products contain iodine, the amount is highly variable and depends on the iodine content of the cattle feed or the use of iodophor disinfectants during milking. It is not as concentrated a source as seafood. * **C. Salt:** This is a common distractor. While **iodized salt** is the most important *fortified* source used in public health to prevent Iodine Deficiency Disorders (IDD), salt itself does not naturally contain significant iodine. * **D. Green leafy vegetables:** The iodine content in plants depends entirely on the iodine concentration of the soil in which they are grown. In "Goiter belts" (where soil is leached of iodine), vegetables are poor sources. **High-Yield NEET-PG Pearls:** * **Daily Requirement:** The WHO recommends **150 μg/day** for adults, **250 μg/day** for pregnant/lactating women, and **90–120 μg/day** for children. * **Indicator of Choice:** The best epidemiological indicator to monitor iodine status in a community is **Urinary Iodine Excretion (UIE)**. * **Iodization Levels:** 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.

Question 284: The poverty line is defined as a daily energy expenditure of at least _______ kcal per person in rural areas.

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

Explanation: In India, the poverty line has historically been linked to nutritional requirements, specifically the **minimum daily calorie intake** necessary for survival and physical work. This concept was formalized by the **Alagh Committee (1979)** and later adopted by the Lakdawala Committee. ### Why 2400 kcal is correct: The definition of the poverty line is based on the average calorie requirement per capita per day. In **rural areas**, the requirement is set at **2400 kcal** because the rural population is predominantly engaged in heavy manual labor (agriculture and allied activities), which demands higher energy expenditure. ### Analysis of Incorrect Options: * **A. 2100 kcal:** This is the defined poverty line for **urban areas**. Urban residents are assumed to lead more sedentary lifestyles or engage in less physically demanding labor compared to their rural counterparts. * **B. 2200 kcal & C. 2300 kcal:** These figures do not correspond to the official poverty line benchmarks established by the Planning Commission of India. While 2200 kcal is often cited as a general average for a "Reference Man" in some contexts, it is not the legislative cutoff for the rural poverty line. ### High-Yield NEET-PG Pearls: * **Reference Man (ICMR 2020):** Weighs 65 kg, aged 19–39 years, engaged in 8 hours of moderate activity. * **Reference Woman (ICMR 2020):** Weighs 55 kg, aged 19–39 years. * **Net Protein Utilization (NPU):** For an average Indian diet, the NPU is approximately **50–60**. * **Balanced Diet Proportions:** Carbohydrates (50-60%), Fats (20-30%), and Proteins (10-15%). * **Thiamine (B1) Deficiency:** Often seen in populations where the diet is based on polished rice, leading to Beriberi.

Question 285: Sanguinarine is derived from which source?

A. Fusarium incamatum
B. Argemone oil (Correct Answer)
C. Jhumjhujia seeds
D. Khesari-dhal

Explanation: **Explanation:** The correct answer is **Argemone oil**. **1. Why Argemone oil is correct:** Argemone oil is extracted from the seeds of *Argemone mexicana* (Prickly Poppy), which are common contaminants of mustard seeds. The oil contains the toxic alkaloid **Sanguinarine**. When ingested, sanguinarine interferes with oxidation of pyruvic acid, leading to the accumulation of pyruvates in the blood. This results in **Epidemic Dropsy**, characterized by sudden bilateral swelling of legs, diarrhea, dyspnea, and cardiac failure. A classic clinical sign is the presence of **glaucoma** and **cutaneous telangiectasis** (sarcoid-like skin lesions). **2. Why other options are incorrect:** * **Fusarium incarnatum:** This is a fungus that contaminates food grains (like wheat or corn) and produces **T-2 toxins**, which are associated with Alimentary Toxic Aleukia (ATA) or Endemic Ascites. * **Jhumjhujia seeds:** These seeds (*Crotalaria spectabilis*) contain **Pyrrolizidine alkaloids**, which cause **Veno-Occlusive Disease (VOD)** of the liver. * **Khesari-dhal:** (*Lathyrus sativus*) contains the neurotoxin **BOAA** (Beta-oxalyl-amino-alanine), which leads to **Lathyrism**, a condition characterized by spastic paraplegia. **High-Yield Clinical Pearls for NEET-PG:** * **Detection Test:** Argemone oil is detected using the **Nitric Acid Test** (brownish-orange ring) or the more sensitive **Paper Chromatography**. * **Target Organ:** In Epidemic Dropsy, the primary pathology is widespread capillary dilatation and permeability. * **Treatment:** There is no specific antidote; management is symptomatic, including bed rest and high-protein diets.

Question 286: Severe malnutrition is diagnosed if serum albumin level is less than:

A. 2 g/dl
B. 2.5 g/dl
C. 3 g/dl (Correct Answer)
D. 3.5 g/dl

Explanation: **Explanation:** Serum albumin is a key biochemical marker used to assess visceral protein status. In the context of nutritional assessment, it serves as a reliable indicator of long-term protein-energy malnutrition (PEM) due to its relatively long half-life (approximately 20 days). **Why 3 g/dl is the correct answer:** According to standard nutritional classifications (including those used by the WHO and in clinical practice), the normal range for serum albumin is typically **3.5 to 5.0 g/dl**. * **Mild Malnutrition:** 3.0 – 3.5 g/dl * **Severe Malnutrition:** **< 3.0 g/dl** A level below 3 g/dl indicates a significant depletion of the body's protein stores, often associated with clinical conditions like Kwashiorkor, where edema develops due to decreased oncotic pressure. **Analysis of Incorrect Options:** * **Option A (2 g/dl) & B (2.5 g/dl):** While these values represent very severe or critical protein deficiency, they are subsets of the "less than 3 g/dl" category. In medical examinations, the threshold for diagnosing the onset of the "severe" category is the standard cutoff of 3 g/dl. * **Option D (3.5 g/dl):** This is generally considered the lower limit of the normal range. Values between 3.0 and 3.5 g/dl are classified as mild malnutrition. **High-Yield Facts for NEET-PG:** * **Half-life:** Albumin has a half-life of **20 days**, making it a marker of chronic malnutrition. * **Pre-albumin:** For acute changes in nutritional status, **Pre-albumin (Transthyretin)** is preferred due to its shorter half-life of **2 days**. * **Transferrin:** Another marker with a half-life of **8–10 days**. * **Edema:** In Kwashiorkor, pitting edema usually manifests when serum albumin falls below **2.5 g/dl**.

Question 287: Which of the following statements about nutritional surveillance is not true?

A. It is a diagnostic approach
B. Assessment involves precise measurements of weight and height
C. Assessment is done by trained persons
D. Done in all children less than 5 years (Correct Answer)

Explanation: ### Explanation **Nutritional Surveillance** is a continuous process of monitoring the nutritional status of a population to provide data for policy-making and program evaluation. #### Why Option D is the Correct Answer (The False Statement) Nutritional surveillance is **not** done for all children under 5 years of age. Instead, it is a **selective process** focused on "at-risk" groups or specific geographical areas where malnutrition is prevalent. Universal screening of all children is a feature of **Growth Monitoring** (e.g., under the ICDS program), not surveillance. Surveillance aims to identify trends in a population rather than individual clinical management. #### Analysis of Other Options * **A. It is a diagnostic approach:** This is true. It is used to "diagnose" the nutritional problems of a community, identifying the causes and extent of malnutrition to trigger organized interventions. * **B. Assessment involves precise measurements:** This is true. To ensure data reliability for policy decisions, standardized and precise anthropometric measurements (Weight-for-age, Height-for-age, etc.) are essential. * **C. Assessment is done by trained persons:** This is true. Unlike routine growth monitoring which may be done by Anganwadi workers, surveillance often requires specialized teams or trained personnel to ensure data accuracy and proper interpretation. #### NEET-PG High-Yield Pearls * **Surveillance vs. Monitoring:** Surveillance is a continuous, long-term process for policy; Monitoring is an intermittent check on the progress of a specific program. * **Objectives of Surveillance:** 1. To aid in policy-making and planning. 2. To provide an early warning system for nutritional disasters (e.g., famine). 3. To evaluate the effectiveness of existing nutritional programs. * **Key Indicators:** Often includes anthropometry, clinical signs of deficiency, and socioeconomic indicators (food prices, crop yields).

Question 288: Which of the following food groups is commonly referred to as 'protective foods'?

A. Vegetables (Correct Answer)
B. Milk
C. Soybean
D. Pulses

Explanation: **Explanation:** Foods are broadly classified into three categories based on their physiological functions: energy-yielding, body-building, and **protective foods**. **1. Why Vegetables are the Correct Answer:** Protective foods are those rich in **vitamins and minerals**. These micronutrients are essential for maintaining the integrity of the immune system, regulating metabolic processes, and protecting the body against infections and chronic diseases. **Vegetables** (especially green leafy vegetables) and **fruits** are the primary sources of these protective nutrients (e.g., Vitamin A, C, Iron, and Calcium). **2. Analysis of Incorrect Options:** * **Milk (Option B):** While milk contains vitamins and minerals, it is primarily classified as a **body-building food** due to its high-quality protein (casein) and calcium content. It is often called a "complete food," but in the context of this functional classification, it falls under body-building. * **Soybean (Option C):** Soybean is the richest plant source of protein (approx. 40%). It is strictly categorized as a **body-building food**. * **Pulses (Option D):** Pulses are major sources of plant-based proteins in the Indian diet. Like soybean, they are classified as **body-building foods**. **High-Yield Clinical Pearls for NEET-PG:** * **Energy-yielding foods:** Carbohydrates and Fats (Cereals, roots, tubers, sugar, oils). * **Body-building foods:** Proteins (Milk, meat, poultry, fish, pulses, nuts). * **Reference Protein:** Egg is considered the reference protein (Biological Value = 94) against which other proteins are compared. * **Limiting Amino Acids:** Pulses are deficient in **Methionine** but rich in Lysine; Cereals are deficient in **Lysine** but rich in Methionine. This is why a cereal-pulse combination is nutritionally superior.

Question 289: What is the recommended initial dose of Vitamin A for prophylaxis in a 9-month-old child?

A. 400,000 IU
B. 500,000 IU
C. 100,000 IU (Correct Answer)
D. 200,000 IU

Explanation: ### Explanation The correct answer is **100,000 IU**. **Underlying Medical Concept:** In India, the **National Prophylaxis Programme against Nutritional Blindness** (under the Reproductive and Child Health program) follows a specific age-based schedule for Vitamin A supplementation to prevent xerophthalmia. * **The first dose** is administered at **9 months** of age (usually along with the Measles/MR vaccine). At this age, the infant's body weight and liver storage capacity are lower, necessitating a smaller dose of **100,000 IU (1 ml)** to ensure safety and prevent toxicity. * **Subsequent doses** (2nd to 9th dose) are administered every 6 months until the age of 5 years, at a dosage of **200,000 IU (2 ml)**. **Analysis of Incorrect Options:** * **Option B & D (200,000 IU):** This is the standard dose for children **aged 1–5 years**. Giving this dose at 9 months increases the risk of hypervitaminosis A (e.g., bulging fontanelle, vomiting). * **Option A & B (400,000 IU / 500,000 IU):** These dosages are significantly higher than any single prophylactic dose recommended in public health guidelines and could be toxic. **High-Yield NEET-PG Pearls:** 1. **Total Doses:** A child receives a total of **9 doses** of Vitamin A by age 5. 2. **Total Cumulative Dose:** The total amount administered over 5 years is **17,00,000 IU** (1 lakh + 8 doses of 2 lakhs). 3. **Treatment vs. Prophylaxis:** For **treating** active Xerophthalmia, the dose is 200,000 IU (or 100,000 IU if <1 year) given on days 0, 1, and 14. 4. **Post-partum:** A single dose of 200,000 IU can be given to the mother within 8 weeks of delivery to increase Vitamin A content in breast milk (if not already supplemented).

Question 290: Shakir's tape is a useful method to measure which of the following?

A. Head circumference
B. Mid-arm circumference (Correct Answer)
C. Height/Length
D. Chest circumference

Explanation: **Explanation:** **Shakir’s Tape** is a simple, non-stretchable fiberglass or plastic tape used specifically for measuring the **Mid-Upper Arm Circumference (MUAC)** in children aged 1 to 5 years. It is a vital tool in community medicine for the rapid screening of protein-energy malnutrition (PEM) in field settings where weighing scales may not be available. The tape is color-coded to simplify interpretation: * **Green (>13.5 cm):** Satisfactory nutritional status. * **Yellow (12.5 – 13.5 cm):** Borderline/Mild-to-moderate malnutrition (at risk). * **Red (<12.5 cm):** Severe malnutrition (Severe Acute Malnutrition - SAM). **Analysis of Incorrect Options:** * **A. Head Circumference:** Measured using a standard flexible tape to monitor brain growth and detect conditions like microcephaly or hydrocephalus, primarily in the first 2 years of life. * **C. Height/Length:** Measured using a Stadiometer (for children >2 years) or an Infantometer (for children <2 years/recumbent length). * **D. Chest Circumference:** Measured at the level of the nipples. In a healthy child, the chest circumference overtakes the head circumference by age 1. **High-Yield Clinical Pearls for NEET-PG:** 1. **Age Group:** MUAC is relatively constant between **1 and 5 years** of age, making it an age-independent indicator for this bracket. 2. **Quac Stick:** Another field tool used to measure MUAC-for-height ratio. 3. **WHO Standards:** While Shakir’s tape uses 12.5 cm as a cutoff, current WHO guidelines define SAM as **MUAC <11.5 cm** for children aged 6–59 months. 4. **Reliability:** MUAC is a better predictor of mortality risk in children than the weight-for-height index.

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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