Nutrition and Health Practice Questions

Q: Which of the following statements is/are true about lathyrism?

Parboiling detoxicates pulses. **Lathyrism** is a form of permanent spastic paraplegia caused by the excessive consumption of *Lathyrus sativus* (Khesari dal), which contains the neurotoxin **BOAA** (Beta-oxalyl-amino-alanine). ### **Explanation of Options** * **D. Parboiling detoxicates pulses (Correct):** The neurotoxin BOAA is water-soluble. Methods to remove the toxin include **steeping** (soaking in hot water and draining) and **parboiling** (similar to the process used for rice). Parboiling is highly effective, removing nearly 80-90% of the toxin, making the pulse safe for consumption. * **A. Vitamin C prophylaxis:** While Vitamin C has been suggested to have a protective role against the toxin in some studies, it is **not** a standard or primary prophylactic measure for lathyrism. Prevention focuses on toxin removal or crop substitution. * **B. Banning of crop:** While the government once banned the sale of Khesari dal, a total ban on cultivation is often impractical in drought-prone areas where it is a "hardy" survival crop. Current strategies focus on education and the development of **low-BOAA varieties** (e.g., Pusa-24) rather than a simple ban. * **C. Flaccid paralysis:** Lathyrism causes **Spastic Paraplegia** (Upper Motor Neuron lesion). It is characterized by increased muscle tone, exaggerated knee jerks, and a typical **scissor gait** due to the involvement of the pyramidal tracts. ### **High-Yield NEET-PG Pearls** * **Toxin:** BOAA (also known as ODAP). * **Safe Limit:** Consumption is generally safe if *Lathyrus* constitutes less than **30%** of the total calorie intake. * **Clinical Stages:** Latent stage → No-stick stage → One-stick stage → Two-stick stage → Crawler stage. * **Target Population:** Typically affects young males (15–45 years) during periods of famine. * **Mnemonic:** **S**pastic, **S**cissor gait, **S**teeping/Parboiling (The 3 S's of Lathyrism).

Q: What is the recommended daily allowance of vitamin C in children?

40 mg/d. **Explanation:** The recommended daily allowance (RDA) for Vitamin C (Ascorbic Acid) is based on the guidelines provided by the **ICMR-NIN (National Institute of Nutrition)**. For children aged 1 to 12 years, the RDA is consistently set at **40 mg/day**. This intake is sufficient to maintain adequate tissue saturation and prevent clinical deficiency (Scurvy). **Why Option A is Correct:** According to the latest ICMR guidelines, the requirement for Vitamin C is 40 mg/day for children. This same value (40 mg/day) also applies to adult males and females (non-pregnant, non-lactating), making it a high-yield "common" number to remember for the exam. **Analysis of Incorrect Options:** * **B (60 mg/d):** This is the RDA for **pregnant women**. During lactation, the requirement increases further to 80 mg/d. * **C & D (100-150 mg/d):** These values are significantly higher than the physiological requirements for children. Such doses are typically reserved for therapeutic supplementation in confirmed cases of Scurvy or during severe malabsorption. **High-Yield Clinical Pearls for NEET-PG:** * **Source:** Guava is the richest source of Vitamin C, followed by Amla (Indian Gooseberry) and citrus fruits. * **Stability:** Vitamin C is the most heat-labile vitamin; it is easily destroyed by cooking and oxidation. * **Function:** It is essential for collagen synthesis (proline hydroxylation) and enhances the **absorption of non-heme iron** from the gut. * **Deficiency:** Scurvy presents with "corkscrew hair," perifollicular hemorrhages, and swollen, bleeding gums. In children, it can cause subperiosteal hemorrhage leading to "pseudoparalysis" (Barlow’s disease).

Q: Which of the following natural elements have anticancer properties?

Vitamin C, Vitamin D, Selenium. ### Explanation The correct answer is **B: Vitamin C, Vitamin D, Selenium**. **1. Why the Correct Answer is Right:** The relationship between nutrition and cancer is a high-yield topic in Community Medicine. Certain micronutrients act as chemopreventive agents through various mechanisms: * **Vitamin C (Ascorbic Acid):** Acts as a potent antioxidant that neutralizes free radicals, preventing DNA damage. It also inhibits the formation of carcinogenic nitrosamines in the stomach. * **Vitamin D:** Research indicates it regulates cell growth, promotes differentiation, and induces apoptosis (programmed cell death) in potentially malignant cells. * **Selenium:** This essential trace element is a cofactor for **glutathione peroxidase**, an enzyme that protects cells from oxidative stress. Epidemiological studies have linked adequate selenium levels to a reduced risk of prostate, lung, and colorectal cancers. **2. Analysis of Incorrect Options:** * **Options A & D (Nitrosoamines):** These are potent **carcinogens**, not anticancer agents. They are found in tobacco smoke and processed meats (cured with nitrites). Including them in an "anticancer" list is factually incorrect. * **Option C (Vitamin C, Selenium):** While both are anticancer, this option is incomplete compared to Option B, which includes Vitamin D—another well-established protective element. **3. NEET-PG High-Yield Pearls:** * **Antioxidant Vitamins:** Remember the triad **A, C, and E**. * **Dietary Fibers:** High intake is protective against **Colorectal Cancer** by reducing intestinal transit time and binding carcinogens. * **Aflatoxins:** Produced by *Aspergillus flavus* (found in stored grains/groundnuts), these are major risk factors for **Hepatocellular Carcinoma**. * **Cruciferous Vegetables:** (Cabbage, Broccoli) contain indoles and isothiocyanates which are highly protective against various cancers.

Q: A 35-year-old pregnant female, 4 months gestation, presents for a routine checkup. Her Hb level is 11 gm/dl. What is the recommended dietary allowance for iron for this patient?

40-50 mg. ### Explanation **1. Why Option A is Correct:** According to the **ICMR-NIN (2020) guidelines**, the Recommended Dietary Allowance (RDA) for iron in a pregnant woman is **40 mg/day**. This is a significant increase from the requirement for a non-pregnant woman (29 mg/day). The increased demand is due to the expansion of maternal red cell mass, the needs of the growing fetus, and the development of the placenta. Since 40 mg falls within the range of **40-50 mg**, Option A is the most accurate choice. **2. Why Other Options are Incorrect:** * **Option B (20-25 mg):** This range is too low for pregnancy. It is closer to the requirement for an adult male (19 mg/day) or a post-menopausal female. * **Option C & D (10-20 mg):** These values are insufficient to prevent gestational anemia. Even a non-pregnant woman of reproductive age requires 29 mg/day to compensate for menstrual blood loss. **3. High-Yield Clinical Pearls for NEET-PG:** * **Anemia Definition in Pregnancy:** According to the WHO, anemia in pregnancy is defined as **Hb < 11 gm/dl**. This patient has a Hb of 11 gm/dl, placing her at the borderline/normal threshold. * **IFA Supplementation (National Guidelines):** Under the *Anemia Mukt Bharat* strategy, all pregnant women should receive **100 mg elemental iron and 500 µg folic acid** daily for 180 days, starting from the second trimester (13 weeks onwards). * **Iron Absorption:** Dietary iron absorption is enhanced by Vitamin C (Citrus fruits) and inhibited by phytates, oxalates, and tannins (Tea/Coffee). * **Lactation RDA:** The iron requirement during lactation actually *decreases* to **23 mg/day** (due to lactational amenorrhea) compared to the pregnant state.

Q: What is the Recommended Dietary Allowance (RDA) of Retinol during pregnancy?

800 mcg. **Explanation:** The Recommended Dietary Allowance (RDA) for Vitamin A (Retinol) is a high-yield topic for NEET-PG, specifically following the **ICMR-NIN 2020 guidelines**. **1. Why Option D (800 mcg) is Correct:** During pregnancy, there is an increased physiological demand for Vitamin A to support fetal growth, organogenesis, and the maintenance of maternal epithelial integrity. According to the latest ICMR guidelines, the RDA for a non-pregnant adult woman is **840 mcg/day**. However, for **pregnancy**, the requirement is specifically categorized as **800 mcg/day of Retinol** (or 6400 mcg of Beta-carotene). This ensures adequate placental transfer without reaching teratogenic thresholds. **2. Analysis of Incorrect Options:** * **Option A (500 mcg):** This value is significantly below the required intake for any adult female category and would put the mother at risk of night blindness. * **Option B (600 mcg):** Previously, older guidelines (ICMR 2010) suggested lower values, but these have been revised upward in the 2020 update. * **Option C (700 mcg):** While closer to the baseline, it does not meet the specific 800 mcg threshold established for the gestational period. **3. Clinical Pearls & High-Yield Facts:** * **Lactation:** The RDA increases significantly during lactation to **950 mcg/day** to compensate for Vitamin A lost in breast milk. * **Teratogenicity:** While deficiency is dangerous, excessive intake (>3000 mcg/day) of preformed Vitamin A is **teratogenic**, potentially causing craniofacial and cardiac defects (Retinoic acid embryopathy). * **Conversion:** 1 mcg of Retinol = 8 mcg of Beta-carotene (as per ICMR 2020). * **Storage:** Vitamin A is stored in the liver in **Ito cells** (Stellate cells) as retinyl palmitate.

Q: A balanced diet typically consists of what macronutrient distribution?

20% proteins, 25% fats, 50% carbohydrates. **Explanation:** A balanced diet is defined as one that contains a variety of foods in such quantities and proportions that the need for energy, proteins, vitamins, minerals, and other nutrients is adequately met. According to standard nutritional guidelines (including ICMR and WHO recommendations for the general population), the ideal macronutrient distribution for a healthy adult is: * **Proteins:** 10–20% of total energy intake. * **Fats:** 20–30% of total energy intake. * **Carbohydrates:** 50–60% of total energy intake. **Option A** is the correct choice as it aligns most closely with these physiological requirements, providing a sustainable balance that prevents protein-energy malnutrition while avoiding excessive lipid intake. **Analysis of Incorrect Options:** * **Option B:** The fat content (35%) is too high. Diets exceeding 30% fat are associated with an increased risk of obesity and cardiovascular diseases. * **Option C:** While carbohydrates and fats are appropriate, 25% protein is higher than the standard requirement for a sedentary or moderately active adult (typically 0.8–1g/kg body weight). * **Option D:** 35% protein is excessively high and characteristic of therapeutic "high-protein" diets rather than a standard balanced diet for the general population. **High-Yield Clinical Pearls for NEET-PG:** * **Energy Density:** Fat provides 9 kcal/g, while Carbohydrates and Proteins provide 4 kcal/g. * **Reference Indian Adult:** The energy requirement for a sedentary male (65kg) is ~2110 kcal/day and for a sedentary female (55kg) is ~1660 kcal/day (ICMR-NIN 2020). * **Essential Fatty Acids:** Should contribute at least 3% of total energy intake. * **Dietary Fiber:** The recommended intake is about 30–40 g/day.

Q: Stunting indicates:

Chronic malnutrition. ### Explanation **Correct Answer: B. Chronic Malnutrition** **Understanding the Concept:** In nutritional epidemiology, growth failure is categorized based on the relationship between height, weight, and age. **Stunting** is defined as **low height-for-age**. It occurs when a child fails to reach their linear growth potential due to long-term, cumulative deficiencies in nutrition or repeated infections. Because bone growth and height are slow-evolving processes, a deficit in height indicates a **chronic (long-term)** nutritional insult. **Analysis of Options:** * **Option A (Acute Malnutrition):** This is represented by **Wasting** (low weight-for-height). Weight is a sensitive indicator that can be lost rapidly during a short-term period of starvation or severe illness (e.g., diarrhea). * **Option C (Both acute and chronic):** This is represented by **Underweight** (low weight-for-age). Since weight is influenced by both the child's height (chronic) and their current body mass (acute), weight-for-age is a composite indicator that does not distinguish between the two. **High-Yield Clinical Pearls for NEET-PG:** 1. **Wasting:** Low Weight-for-Height → Indicates **Acute** malnutrition (Current). 2. **Stunting:** Low Height-for-Age → Indicates **Chronic** malnutrition (Past/Cumulative). 3. **Underweight:** Low Weight-for-Age → Composite indicator (Acute + Chronic). 4. **Z-Score Cut-offs:** According to WHO standards, Moderate Malnutrition is defined as a Z-score between **-2 and -3 SD**, and Severe Malnutrition is **< -3 SD**. 5. **Gomez Classification:** Uses weight-for-age to grade malnutrition. 6. **Waterlow’s Classification:** Specifically uses Wasting and Stunting to differentiate nutritional status.

Q: Endemic cretinism is seen when Iodine uptake is less than?

20 micrograms/day. **Explanation:** The correct answer is **20 micrograms/day**. **1. Underlying Medical Concept:** Iodine is essential for the synthesis of thyroid hormones (T3 and T4), which are critical for fetal brain development. According to the WHO and global epidemiological studies, **Endemic Cretinism**—characterized by irreversible mental retardation, deaf-mutism, and motor spasticity—typically appears in a population only when the environmental iodine deficiency is severe. Specifically, it manifests when the average daily iodine intake falls below **20 µg/day**. At this critical threshold, the thyroid gland can no longer maintain euthyroidism, leading to profound developmental consequences in the offspring of iodine-deficient mothers. **2. Analysis of Options:** * **A (5 µg/day):** This represents extreme deficiency, but the clinical threshold for the onset of endemic cretinism is established at the higher level of 20 µg/day. * **C & D (50 & 75 µg/day):** While these levels are below the RDA (150 µg/day), they generally result in **Goiter** (compensatory enlargement) rather than the severe neurological damage seen in cretinism. Goiter prevalence increases when intake is 5% in school-age children. * **Urinary Iodine Excretion (UIE):** The most common indicator. Normal is >100 µg/L. Severe deficiency is <20 µg/L. * **Neonatal TSH:** Best indicator for monitoring the impact of iodine prophylaxis. * **Iodized Salt:** Contains 30 ppm of iodine at the production level and 15 ppm at the consumer level.

Q: The vitamin A supplement administered in the 'Prevention of nutritional blindness in children programme' contains:

1 Lakh IU/ml. ### Explanation **1. Why 1 Lakh IU/ml is Correct:** The National Prophylaxis Programme Against Nutritional Blindness due to Vitamin A Deficiency (now integrated into the RMNCH+A strategy) uses a concentrated **oil-based solution** of Vitamin A (Retinyl palmitate). The standard formulation provided by the government is **1 Lakh IU per 1 ml**. This concentration is designed for ease of administration using a standardized 2 ml spoon: * **Infants (6–11 months):** Receive a half-spoon dose (1 ml), which equals **1 Lakh IU**. * **Children (1–5 years):** Receive a full-spoon dose (2 ml), which equals **2 Lakh IU**. **2. Why Other Options are Incorrect:** * **25,000 IU/ml:** This concentration is too low for mass prophylaxis. It would require administering 4–8 ml of oil, increasing the risk of aspiration in young children. * **3 Lakh IU/ml and 5 Lakh IU/ml:** These concentrations are excessively high. High-dose Vitamin A can lead to acute toxicity (Hypervitaminosis A), characterized by bulging fontanelles, vomiting, and increased intracranial pressure. **3. High-Yield Clinical Pearls for NEET-PG:** * **Schedule:** The first dose is given at **9 months** (with Measles/MR vaccine). Subsequent doses are given every **6 months** up to the age of 5 years. * **Total Doses:** A child receives a total of **9 doses** (1 + 8). * **Total Cumulative Dose:** 1 Lakh (1st dose) + [8 doses × 2 Lakh] = **17 Lakh IU**. * **Target Age Group:** 6 months to 5 years (though the first routine dose starts at 9 months). * **Treatment Dose:** For clinical Xerophthalmia (Bitot's spots/Night blindness), the schedule is **2 Lakh IU** orally on Day 0, Day 1, and Day 14 (Age <1 year: 1 Lakh IU).

Question 1

Which of the following statements is/are true about lathyrism?

Accepted Answer

Parboiling detoxicates pulses

Answer

Vitamin C prophylaxis

Answer

Banning of crop

Answer

Flaccid paralysis

Question 2

What is the recommended daily allowance of vitamin C in children?

Accepted Answer

40 mg/d

Answer

60 mg/d

Answer

100 mg/d

Answer

150 mg/d

Question 3

Which of the following natural elements have anticancer properties?

Accepted Answer

Vitamin C, Vitamin D, Selenium

Answer

Nitrosoamines, Vitamin D

Answer

Vitamin C, Selenium

Answer

Nitrosoamines, Vitamin C

Question 4

A 35-year-old pregnant female, 4 months gestation, presents for a routine checkup. Her Hb level is 11 gm/dl. What is the recommended dietary allowance for iron for this patient?

Accepted Answer

40-50 mg

Answer

20-25 mg

Answer

15-20 mg

Answer

10-15 mg

Question 5

What is the Recommended Dietary Allowance (RDA) of Retinol during pregnancy?

Accepted Answer

800 mcg

Answer

500 mcg

Answer

600 mcg

Answer

700 mcg

Question 6

A balanced diet typically consists of what macronutrient distribution?

Accepted Answer

20% proteins, 25% fats, 50% carbohydrates

Answer

20% proteins, 35% fats, 45% carbohydrates

Answer

25% proteins, 25% fats, 50% carbohydrates

Answer

35% proteins, 15% fats, 50% carbohydrates

Question 7

Stunting indicates:

Accepted Answer

Chronic malnutrition

Answer

Acute malnutrition

Answer

Both acute and chronic malnutrition

Answer

None of the above

Question 8

Obesity is associated with a decreased risk of which of the following conditions?

Accepted Answer

Osteoporosis

Answer

Hypertension

Answer

Hyperuricemia

Answer

Heart disease

Question 9

Endemic cretinism is seen when Iodine uptake is less than?

Accepted Answer

20 micrograms/day

Answer

5 micrograms/day

Answer

50 micrograms/day

Answer

75 micrograms/day

Question 10

The vitamin A supplement administered in the 'Prevention of nutritional blindness in children programme' contains:

Accepted Answer

1 Lakh IU/ml

Answer

25,000 IU/ml

Answer

3 Lakh IU/ml

Answer

5 Lakh IU/ml

Nutrition and Health — MCQs

Nutrition and Health — MCQs

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