Nutrition and Health — MCQs

Nutrition and Health Indian Medical PG Practice Questions and MCQs

Question 371: What does the Kanawati index measure?

A. Height divided by head circumference
B. Mid-arm circumference divided by head circumference (Correct Answer)
C. Weight divided by height
D. Abdominal circumference divided by head circumference

Explanation: The **Kanawati Index** (also known as the Kanawati and McLaren Index) is a rapid screening tool used to assess the nutritional status of children, particularly those between **1 and 5 years of age**. ### 1. Why Option B is Correct The index is calculated as: **Kanawati Index = Mid-Upper Arm Circumference (MUAC) / Head Circumference** * **Medical Concept:** In early childhood (1–5 years), the head circumference remains relatively constant, while the MUAC is highly sensitive to muscle wasting and fat loss. A ratio of **>0.31** is considered normal. Values below this indicate Protein-Energy Malnutrition (PEM): * **0.31 – 0.28:** Mild PEM * **0.28 – 0.25:** Moderate PEM * **< 0.25:** Severe PEM ### 2. Why Other Options are Incorrect * **Option A (Height/Head Circumference):** This is not a standard anthropometric index for malnutrition. * **Option C (Weight/Height):** This is the basis for **Quetelet’s Index (BMI)** or **Wasting**. While it measures acute malnutrition, it is not the Kanawati Index. * **Option D (Abdominal/Head Circumference):** This ratio is sometimes used in fetal ultrasound to detect intrauterine growth restriction (IUGR), but it is not used for postnatal nutritional screening in the community. ### 3. High-Yield Clinical Pearls for NEET-PG * **Age Group:** Most effective for children aged **12–60 months**. * **Advantage:** It is "age-independent" because both parameters change slowly in the 1–5 year age group, making it useful when the child's exact age is unknown. * **Shakir’s Tape:** Often used to measure MUAC. A MUAC **<12.5 cm** indicates malnutrition. * **Quac Stick:** Another tool that relates MUAC to height (MUAC-for-height).

Question 372: Which one is at the top of the food pyramid?

A. Fats and oils (Correct Answer)
B. Fruits
C. Vegetables
D. Pulses

Explanation: **Explanation:** The food pyramid is a visual representation of a balanced diet, designed to guide the proportion of different food groups required for optimal health. The structure is based on the principle that foods at the **base** should be consumed in the largest quantities, while those at the **apex (top)** should be consumed sparingly. 1. **Why Fats and Oils are Correct:** Fats, oils, and sugars occupy the narrowest part at the **top of the pyramid**. This signifies that while they are essential for certain bodily functions (like absorbing fat-soluble vitamins), they are calorie-dense and should be consumed in minimal amounts to prevent obesity and cardiovascular diseases. 2. **Why Other Options are Incorrect:** * **Fruits and Vegetables (Options B & C):** These are placed in the second tier from the bottom. They are rich in micronutrients and fiber and should be consumed liberally. * **Pulses (Option D):** Along with meat, eggs, and dairy, pulses are placed in the third tier. They are primary sources of protein and are required in moderate amounts. * *Note:* The **base** of the pyramid consists of cereals and millets (carbohydrates), which should form the bulk of the diet. **High-Yield Clinical Pearls for NEET-PG:** * **The "Inverted Pyramid" Concept:** In some modern nutritional models, physical activity is placed at the base, emphasizing its foundational role in health. * **Balanced Diet Proportions:** In a typical Indian balanced diet, carbohydrates should provide 50-60% of total calories, fats 20-30%, and proteins 10-15%. * **Essential Fatty Acids:** While fats are at the top, remember that Linoleic acid (Omega-6) and Alpha-linolenic acid (Omega-3) are "essential" because the body cannot synthesize them.

Question 373: Oral Rehydration Solution (ORS) should be discarded when?

A. After 6 hours
B. After 12 hours
C. After 24 hours (Correct Answer)
D. After 36 hours

Explanation: **Explanation:** The correct answer is **C. After 24 hours.** **Why it is correct:** Oral Rehydration Solution (ORS) is a glucose-electrolyte solution used to treat dehydration. Once the ORS powder is dissolved in water, it becomes a potential medium for bacterial growth. Glucose, a key component of ORS, facilitates the multiplication of microorganisms if left at room temperature. To ensure safety and prevent the risk of secondary bacterial gastroenteritis, the WHO and UNICEF guidelines strictly mandate that any unused ORS solution must be discarded **24 hours** after preparation. **Why other options are incorrect:** * **Options A & B (6 and 12 hours):** While the solution is certainly safe at these intervals, discarding it this early would be wasteful, especially in resource-limited settings where ORS is most needed. * **Option D (36 hours):** By this time, the risk of significant bacterial contamination is high. The chemical stability of the bicarbonate or citrate components may also begin to degrade, making the solution less effective and potentially harmful. **High-Yield Clinical Pearls for NEET-PG:** * **Standard WHO ORS Composition (per liter):** Sodium Chloride (2.6g), Glucose (13.5g), Potassium Chloride (1.5g), and Trisodium Citrate (2.9g). * **Osmolarity:** The current "Low Osmolarity ORS" has a total osmolarity of **245 mOsm/L**. This is preferred over the older formulation (311 mOsm/L) as it reduces stool output and the need for IV fluids. * **Preparation:** Always use boiled and cooled water. Do not boil the solution after adding the ORS powder, as this can alter the chemical composition. * **Zinc Supplementation:** In children with diarrhea, Zinc should be given alongside ORS (20mg/day for 10-14 days; 10mg/day for infants <6 months) to reduce the duration and severity of the episode.

Question 374: Which index is a height-independent measure of obesity?

A. Corpulence index (Correct Answer)
B. Quetelet index
C. Broca index
D. Ponderal index

Explanation: The correct answer is **A. Corpulence index**. ### **Explanation** The **Corpulence Index** (also known as Rohrer's Index) is calculated as **(Weight / Height³)**. Unlike the Body Mass Index (BMI), which assumes a linear relationship between weight and height squared, the Corpulence Index is mathematically designed to be **independent of height**. It is particularly useful in pediatrics and for individuals with atypical body proportions, as it accounts for the three-dimensional nature of body mass. ### **Analysis of Incorrect Options** * **B. Quetelet Index:** This is the standard **Body Mass Index (BMI)**, calculated as **Weight (kg) / Height (m²)**. While widely used, it is not truly height-independent; it often overestimates fatness in tall individuals and underestimates it in short individuals. * **C. Broca Index:** A simple formula used to estimate "Ideal Body Weight." It is calculated as **Height (cm) – 100**. It is highly dependent on height and does not measure obesity directly. * **D. Ponderal Index:** Calculated as **Height / ∛Weight**. While it is used to assess fetal growth and physical build, it is essentially a reciprocal of the Corpulence Index and remains influenced by the height-to-mass ratio. ### **High-Yield NEET-PG Pearls** * **Best indicator of abdominal obesity:** Waist-Hip Ratio (WHR). A ratio **>0.9 in men** and **>0.85 in women** indicates central obesity. * **Most commonly used tool for obesity:** BMI (Quetelet Index). * **Overweight vs. Obesity (WHO):** BMI 25–29.9 is Overweight; BMI ≥30 is Obese. * **Asian-Indian Criteria:** Overweight is BMI 23–24.9; Obesity is BMI ≥25. * **Lorentz’s Formula:** A more refined version of Broca’s index that accounts for gender.

Question 375: Under the Food Safety and Standards Act, non-vegetarian foods containing only eggs are labeled with what color mark?

A. Green
B. Yellow
C. Orange
D. Brown (Correct Answer)

Explanation: **Explanation:** Under the **Food Safety and Standards (Packaging and Labelling) Regulations**, it is mandatory for every package of food to bear a specific symbol to indicate whether the contents are vegetarian or non-vegetarian. **1. Why Brown is Correct:** According to the FSSAI (Food Safety and Standards Authority of India) guidelines, **non-vegetarian food** is defined as any food which contains whole or part of any animal including birds, fresh water or marine animals, or **eggs**. Previously, the symbol for non-vegetarian food was a brown circle inside a brown square. However, to improve visibility for color-blind individuals, the current regulation specifies a **brown color filled triangle** inside a square with a brown outline. Since eggs are animal products, foods containing only eggs are classified as non-vegetarian and must bear the **Brown** mark. **2. Why other options are incorrect:** * **Green:** This symbol (a green color filled circle inside a square) is reserved exclusively for **Vegetarian** food, which contains no animal-derived ingredients (except milk and milk products). * **Yellow/Orange:** These colors are not used for the primary classification of veg/non-veg food. However, in different contexts of food safety, orange may be associated with specific risk warnings or fortification (e.g., the "+F" logo for fortified foods is often blue/dark blue). **High-Yield Clinical Pearls for NEET-PG:** * **Milk Exception:** Even though milk is an animal product, it is classified as **Vegetarian** under FSSAI rules. * **The Symbol Change:** Remember the shift from "Circle" to **"Triangle"** for non-veg food (Brown) to distinguish it from the "Circle" for veg food (Green). * **Fortification Logo:** Look for the **Square with a +F** symbol, which indicates food fortified with micronutrients (Vit A, D, Iron, Folic Acid, B12) to combat "hidden hunger."

Question 376: What is/are the component(s) of nutrition surveillance?

A. Policy maker
B. DOTS
C. Nutritional survey
D. AFP surveillance (Correct Answer)

Explanation: **Explanation:** Nutritional surveillance is the continuous monitoring of the nutritional status of a population to provide data for policy-making and program evaluation. While it primarily focuses on anthropometry and dietary intake, it also incorporates **sentinel surveillance** of specific diseases that are closely linked to nutritional status or serve as indicators of health system reach. **Why AFP Surveillance is the Correct Answer:** In the context of public health monitoring in India, **Acute Flaccid Paralysis (AFP) surveillance** (part of the Polio Eradication Program) is often integrated with nutritional surveillance. This is because the infrastructure used for AFP surveillance—which involves a sensitive, nationwide network of reporting units—is utilized to monitor other health indicators, including nutritional deficiencies and the impact of supplementation programs. It serves as a functional model for how surveillance data is collected and reported from the field to the central level. **Analysis of Incorrect Options:** * **A. Policy maker:** These are the *users* of the data generated by surveillance, not a component of the surveillance process itself. * **B. DOTS:** This is a strategy for Tuberculosis treatment (Directly Observed Treatment, Short-course). While TB and nutrition are linked, DOTS is a management protocol, not a component of nutritional surveillance. * **C. Nutritional survey:** A survey is a **cross-sectional, one-time** assessment. Surveillance, by definition, is **continuous and ongoing**. While surveys provide data, they are distinct from the continuous process of surveillance. **High-Yield Pearls for NEET-PG:** * **Nutritional Surveillance vs. Survey:** Surveillance is "continuous" (like a movie), while a survey is "episodic" (like a snapshot). * **Key Indicators:** The three main components of nutritional surveillance include: 1. Health data (morbidity/mortality), 2. Agricultural data (food availability), and 3. Socio-economic data. * **WHO Definition:** Nutritional surveillance is "to monitor the nutrition status of a population and to provide a basis for decisions on policy and programs."

Question 377: Hypothyroidism in sub-Himalayan regions is primarily due to deficiency of which essential micronutrient?

A. Iodine (Correct Answer)
B. Iron
C. Copper
D. Selenium

Explanation: **Explanation:** The sub-Himalayan region is a classic example of a **"Goitre Belt."** The primary cause of hypothyroidism in these areas is **Iodine deficiency**. This occurs because the soil in mountainous regions is frequently leached of iodine due to heavy rainfall and melting snow. Consequently, crops grown in this soil are iodine-deficient, leading to inadequate dietary intake among the local population. Iodine is the essential substrate for the synthesis of thyroid hormones (T3 and T4); its deficiency leads to compensatory pituitary secretion of TSH, resulting in thyroid hyperplasia (Goitre) and hypothyroidism. **Analysis of Incorrect Options:** * **B. Iron:** While iron deficiency is the most common nutritional deficiency in India (causing anemia), it does not directly cause hypothyroidism. However, iron is a cofactor for *thyroid peroxidase*, so deficiency can sometimes worsen existing iodine deficiency disorders. * **C. Copper:** Copper is a trace element involved in energy production and iron metabolism. It is not a primary driver of thyroid dysfunction in specific geographic belts. * **D. Selenium:** Selenium is a constituent of *iodothyronine deiodinases* (which convert T4 to T3). While selenium deficiency can exacerbate thyroid issues, it is considered a secondary factor compared to the environmental lack of iodine in the Himalayas. **High-Yield Clinical Pearls for NEET-PG:** * **Iodine Deficiency Disorders (IDD):** Includes goitre, cretinism, subnormal intelligence, and stillbirths. * **Indicator of IDD:** The most sensitive indicator for newborn screening is **TSH levels**, while the best indicator for community assessment is **Urinary Iodine Excretion (UIE)**. * **Public Health Goal:** The National Iodine Deficiency Disorders Control Programme (NIDDCP) aims to ensure a consumption of iodized salt with at least **15 ppm** of iodine at the household level.

Question 378: Which of the following components are included in the National Iron Plus Initiative?

A. Biweekly supplementation of iron and folic acid to children aged 6-60 months (Correct Answer)
B. Biweekly supplementation of iron and folic acid to pregnant and lactating women
C. Biweekly supplementation of iron and folic acid to adolescent girls
D. All of the above are part of the initiative

Explanation: The **National Iron Plus Initiative (NIPI)** was launched to address the high prevalence of anemia across the life cycle. The core strategy involves the supervised administration of Iron and Folic Acid (IFA) supplements to specific age groups. ### **Explanation of the Correct Option** **Option A is correct** because, under NIPI guidelines, children aged **6 months to 5 years (60 months)** are prescribed a specific biweekly regimen. They receive **1 ml of IFA syrup** (containing 20 mg of elemental iron and 100 mcg of folic acid) **twice a week**. This frequent, low-dose administration is designed to build iron stores safely in toddlers. ### **Why Other Options are Incorrect** * **Option B & C:** These are incorrect because the frequency is wrong. For **Adolescents (10–19 years)**, **Pregnant women**, and **Lactating mothers**, the supplementation schedule is **Weekly** (WIFS - Weekly Iron and Folic Acid Supplementation) or **Daily** (during pregnancy), but **never biweekly**. Biweekly dosing is exclusive to the 6–60 month age group. ### **High-Yield Clinical Pearls for NEET-PG** * **The "6-6-6" Rule for NIPI Dosage:** 1. **6–60 months:** 20 mg Iron + 100 mcg FA (**Biweekly**). 2. **5–10 years:** 45 mg Iron + 400 mcg FA (**Weekly**). 3. **10–19 years:** 100 mg Iron + 500 mcg FA (**Weekly**). * **Pregnancy Protocol:** 100 mg Iron + 500 mcg FA **daily** for 180 days, starting after the first trimester, followed by another 180 days post-partum. * **Prophylaxis vs. Treatment:** NIPI focuses on *prophylaxis*. If a patient is diagnosed with clinical anemia, the dosage is doubled (therapeutic dose). * **Deworming:** NIPI is integrated with biannual Albendazole administration (National Deworming Day) to maximize iron absorption.

Question 379: All of the following are milk-borne diseases except?

A. Brucellosis
B. Pasteurellosis (Correct Answer)
C. Streptococcal infections
D. Viral hepatitis

Explanation: **Explanation:** Milk-borne diseases are infections transmitted to humans through the consumption of raw or improperly processed milk and milk products. These are categorized into infections derived from the animal (e.g., Tuberculosis, Brucellosis) and those resulting from human contamination (e.g., Typhoid, Cholera). **Why Pasteurellosis is the correct answer:** **Pasteurellosis** (caused by *Pasteurella multocida*) is primarily a zoonotic infection transmitted through **animal bites or scratches**, most commonly from cats and dogs. It typically causes skin and soft tissue infections (cellulitis). It is **not** recognized as a milk-borne pathogen, as the bacteria do not typically colonize the mammary glands or survive the milk production chain to cause human disease via ingestion. **Analysis of incorrect options:** * **Brucellosis (Option A):** One of the most important milk-borne diseases. It is transmitted by consuming raw milk from infected cows, goats, or sheep. It is a classic cause of "Undulant fever." * **Streptococcal infections (Option B):** Milk can be contaminated by humans (carriers) or by cows with mastitis. This can lead to outbreaks of septic sore throat or scarlet fever. * **Viral Hepatitis (Option D):** Specifically **Hepatitis A and E** are transmitted via the feco-oral route. Milk can act as a vehicle if it is contaminated by infected handlers or contaminated water used for adulteration. **High-Yield Clinical Pearls for NEET-PG:** * **Classification:** Milk-borne diseases are divided into **Primary** (from the animal, e.g., *Bovine TB, Brucellosis, Q fever, Anthrax*) and **Secondary** (human contamination, e.g., *Typhoid, Shigellosis, Staphylococcal food poisoning*). * **Pasteurization:** Most milk-borne pathogens are destroyed by pasteurization (Holder method: 63°C for 30 mins; HTST: 72°C for 15 secs). * **Q Fever:** *Coxiella burnetii* is the most heat-resistant pathogen found in milk; its destruction is the standard for successful pasteurization.

Question 380: Which of the following measures is most effective in reducing obesity?

A. Decrease fat intake while maintaining a feeling of fullness.
B. Engage in regular exercise with the same caloric intake. (Correct Answer)
C. Reduce only the fat content in the diet.
D. Reduce the intake of fats, carbohydrates, and protein simultaneously.

Explanation: ### Explanation **Correct Option: B. Engage in regular exercise with the same caloric intake.** The fundamental principle of weight management is the **Energy Balance Equation**. To reduce obesity, one must create a negative energy balance (Energy Expenditure > Energy Intake). Regular physical activity is considered the most effective long-term measure for reducing obesity because it: 1. **Increases Total Energy Expenditure (TEE):** Exercise burns calories directly. 2. **Boosts Basal Metabolic Rate (BMR):** Resistance and aerobic training increase lean muscle mass; since muscle is metabolically more active than fat, the body burns more calories even at rest. 3. **Improves Insulin Sensitivity:** Exercise enhances glucose uptake by muscles, reducing the lipogenic (fat-storing) effect of insulin. Maintaining the same caloric intake while increasing expenditure ensures a consistent caloric deficit without the metabolic slowdown often associated with extreme starvation diets. **Analysis of Incorrect Options:** * **Option A & C:** Reducing fat intake alone is often ineffective if replaced by high-glycemic carbohydrates. While fats are calorie-dense (9 kcal/g), obesity is a multifactorial metabolic issue; simply "feeling full" or cutting one macronutrient does not guarantee a metabolic shift toward fat oxidation. * **Option D:** Simultaneously reducing all macronutrients (starvation/very low-calorie diets) leads to a rapid drop in BMR. The body enters "survival mode," making long-term weight loss unsustainable and leading to the "yo-yo effect" (weight regain). **High-Yield Clinical Pearls for NEET-PG:** * **Quetelet's Index:** BMI = Weight (kg) / Height (m²). * **Obesity Classification (WHO):** Overweight (BMI 25–29.9), Class I Obesity (30–34.9), Class II (35–39.9), Class III (≥40). * **Asian-Indian Cut-offs:** Overweight (23–24.9), Obesity (≥25). * **Waist-Hip Ratio:** A significant predictor of metabolic syndrome. High risk if >0.9 (men) or >0.85 (women). * **Best Indicator of Childhood Obesity:** BMI-for-age (WHO Growth Charts).

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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