Nutrition and Health Practice Questions

Q: What does the Kanawati index measure?

Mid-arm circumference divided by head circumference. 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).

Q: Which one is at the top of the food pyramid?

Fats and oils. **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.

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

After 24 hours. **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.

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

Corpulence index. 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.

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

Brown. **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."

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

Iodine. **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 1

What does the Kanawati index measure?

Accepted Answer

Mid-arm circumference divided by head circumference

Answer

Height divided by head circumference

Answer

Weight divided by height

Answer

Abdominal circumference divided by head circumference

Question 2

Which one is at the top of the food pyramid?

Accepted Answer

Fats and oils

Answer

Fruits

Answer

Vegetables

Answer

Pulses

Question 3

Oral Rehydration Solution (ORS) should be discarded when?

Accepted Answer

After 24 hours

Answer

After 6 hours

Answer

After 12 hours

Answer

After 36 hours

Question 4

Which index is a height-independent measure of obesity?

Accepted Answer

Corpulence index

Answer

Quetelet index

Answer

Broca index

Answer

Ponderal index

Question 5

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

Accepted Answer

Brown

Answer

Green

Answer

Yellow

Answer

Orange

Question 6

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

Accepted Answer

AFP surveillance

Answer

Policy maker

Answer

DOTS

Answer

Nutritional survey

Question 7

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

Accepted Answer

Iodine

Answer

Iron

Answer

Copper

Answer

Selenium

Question 8

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

Accepted Answer

Biweekly supplementation of iron and folic acid to children aged 6-60 months

Answer

Biweekly supplementation of iron and folic acid to pregnant and lactating women

Answer

Biweekly supplementation of iron and folic acid to adolescent girls

Answer

All of the above are part of the initiative

Question 9

All of the following are milk-borne diseases except?

Accepted Answer

Pasteurellosis

Answer

Brucellosis

Answer

Streptococcal infections

Answer

Viral hepatitis

Question 10

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

Accepted Answer

Engage in regular exercise with the same caloric intake.

Answer

Decrease fat intake while maintaining a feeling of fullness.

Answer

Reduce only the fat content in the diet.

Answer

Reduce the intake of fats, carbohydrates, and protein simultaneously.

Nutrition and Health — MCQs

Nutrition and Health — MCQs

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