Nutrition and Health — MCQs

Nutrition and Health Indian Medical PG Practice Questions and MCQs

Question 261: What are the elemental iron and folic acid contents of pediatric iron folic acid tablets supplied under the Rural Child Health (RCH) program?

A. 20 mg iron and 100 mcg folic acid (Correct Answer)
B. 40 mg iron and 100 mcg folic acid
C. 40 mg iron and 50 mcg folic acid
D. 60 mg iron and 100 mcg folic acid

Explanation: **Explanation:** The correct answer is **20 mg elemental iron and 100 mcg folic acid**. This dosage is standardized under the **Anemia Mukt Bharat (AMB)** strategy (formerly part of the RCH program) for the prophylactic management of nutritional anemia in children. **1. Why Option A is Correct:** Under the current National Health Mission (NHM) guidelines, children aged **5–9 years** (primary school-age) are provided with a pink-colored, enteric-coated tablet containing 20 mg of elemental iron and 100 mcg of folic acid. For younger children (6 months to 5 years), the same dosage (20 mg iron/100 mcg FA) is administered as 1 ml of iron-folic acid syrup bi-weekly. **2. Why Other Options are Incorrect:** * **Options B & C:** These dosages do not align with any standard pediatric prophylactic protocols in India. 40 mg of iron is not a standard dose for routine supplementation in these specific age brackets. * **Option D:** 60 mg of elemental iron and 500 mcg (0.5 mg) of folic acid is the standard adult dose used for **Adolescents (10–19 years)** and **Pregnant/Lactating women**. **High-Yield Clinical Pearls for NEET-PG:** * **Color Coding:** * **Pink Tablet:** Children (5–9 years) - 20 mg Iron + 100 mcg FA. * **Blue Tablet:** Adolescents (10–19 years) - 60 mg Iron + 500 mcg FA. * **Red Tablet:** Pregnant and Lactating women - 60 mg Iron + 500 mcg FA. * **Frequency:** For children (5–9 years) and adolescents, the dosage is **weekly** (WIFS - Weekly Iron and Folic Acid Supplementation). For pregnant women, it is **daily** for 180 days. * **Elemental Iron Calculation:** Remember that Dried Ferrous Sulfate contains ~33% elemental iron, while Ferrous Fumarate contains ~33% and Ferrous Gluconate ~12%. Always check if the question asks for the salt weight or elemental weight.

Question 262: What is the normal safe limit of fluoride content in drinking water?

A. 0.5 to 0.8 mg/L (Correct Answer)
B. 0.8 to 1.0 mg/L
C. 0.2 to 0.5 mg/L
D. 0.2 to 0.8 mg/L

Explanation: **Explanation:** Fluoride is often called a "double-edged sword" in public health because the margin between its beneficial and toxic effects is narrow. The primary medical objective of maintaining fluoride in drinking water is to prevent **dental caries** while avoiding **fluorosis**. **1. Why 0.5 to 0.8 mg/L is correct:** According to standard public health guidelines (including Park’s Preventive and Social Medicine), the **optimum/safe level** of fluoride in drinking water is **0.5 to 0.8 mg/L**. At this concentration, fluoride promotes the remineralization of enamel by forming fluorapatite, which is more resistant to acid than hydroxyapatite, effectively reducing dental caries without causing systemic toxicity. **2. Analysis of Incorrect Options:** * **0.8 to 1.0 mg/L (Option B):** While 1.0 mg/L is often cited as the upper limit of "optimal," levels consistently approaching or exceeding 1.0 mg/L significantly increase the risk of **dental fluorosis** (mottling of teeth), especially in warmer climates where water consumption is higher. * **0.2 to 0.5 mg/L (Option C):** This range is considered **sub-optimal**. It is insufficient to provide the protective anti-cariogenic benefits required to strengthen tooth enamel. * **0.2 to 0.8 mg/L (Option D):** This range is too broad and includes values that are too low to be clinically effective for caries prevention. **High-Yield Clinical Pearls for NEET-PG:** * **Dental Fluorosis:** Occurs when fluoride levels exceed **1.5 mg/L**. It manifests as horizontal streaks or paper-white patches on enamel. * **Skeletal Fluorosis:** Occurs with prolonged exposure to levels **>3.0 to 6.0 mg/L**. It leads to "crippling fluorosis" and "knock-knees" (Genu valgum). * **Defluoridation:** The **Nalgonda Technique** (using alum and lime) is the most common method used in India to remove excess fluoride. * **Safe Limit (WHO):** The WHO guideline upper limit for fluoride in drinking water is **1.5 mg/L**.

Question 263: Which of the following causes lathyrism?

A. Kesari dhal (Correct Answer)
B. Mung dhal
C. Jhunjunia seeds
D. Gondhli seeds

Explanation: **Explanation:** **Lathyrism** is a non-fungal food toxico-infection caused by the excessive consumption of **Kesari dhal** (*Lathyrus sativus*). It is a form of permanent spastic paraplegia resulting from the neurotoxic effects of the amino acid **BOAA (Beta-oxalyl-amino-alanine)**, also known as ODAP. * **Why Kesari dhal is correct:** This pulse is hardy and drought-resistant, often consumed by low-income groups during food shortages. When it constitutes more than 30% of the total calorie intake for 2–6 months, BOAA causes the death of upper motor neurons, leading to a characteristic "scissor gait." * **Why other options are incorrect:** * **Mung dhal:** This is a standard, safe pulse (*Vigna radiata*) with no known neurotoxic properties. * **Jhunjunia seeds:** These are seeds of *Crotalaria spectabilis*, which contain pyrrolizidine alkaloids. Ingestion leads to **Veno-Occlusive Disease (VOD)** of the liver, not lathyrism. * **Gondhli seeds:** These are weed seeds often found as contaminants in cereals; however, they are not associated with the specific clinical syndrome of lathyrism. **High-Yield Clinical Pearls for NEET-PG:** * **Stages of Lathyrism:** Latent stage → No-stick stage → One-stick stage → Two-stick stage → Crawler stage. * **Prevention:** The safest method to remove BOAA is **steeping** (soaking in hot water and draining) or **parboiling**. * **Epidemiology:** It is most commonly seen in the age group of 5–45 years and is more prevalent in males. * **Differential Diagnosis:** Do not confuse with **Epidemic Dropsy**, which is caused by *Argemone mexicana* (Sanguinarine toxin) contaminating mustard oil.

Question 264: Neurolathyrism is due to?

A. Argemone oil
B. Jhunjhunia
C. Khesari dal (Correct Answer)
D. None of the above

Explanation: **Explanation:** **Neurolathyrism** is a form of permanent spastic paraplegia caused by the excessive consumption of **Khesari dal (*Lathyrus sativus*)**. It is a major public health concern in parts of India where this pulse is used as a staple during droughts due to its hardy nature. 1. **Why Khesari dal is correct:** The pulse contains a potent neurotoxin called **BOAA (Beta-oxalyl-amino-alanine)**, also known as ODAP. Chronic ingestion (usually when Khesari dal constitutes >30% of the diet for 2–6 months) leads to the destruction of upper motor neurons. This results in sudden onset, irreversible spastic paralysis of the lower limbs. 2. **Why other options are incorrect:** * **Argemone oil:** Contamination of mustard oil with Argemone mexicana seeds causes **Epidemic Dropsy**. The toxin involved is **Sanguinarine**, which leads to oxidative stress, edema, and cardiac failure. * **Jhunjhunia:** Consumption of *Crotalaria* seeds (Jhunjhunia) mixed with food grains leads to **Veno-occlusive disease (VOD)** of the liver, characterized by ascites and jaundice. The toxin involved is **Pyrrolizidine alkaloid**. **High-Yield Clinical Pearls for NEET-PG:** * **Stages of Neurolathyrism:** Latent stage → No-stick stage → One-stick stage → Two-stick stage → Crawler stage. * **Prevention:** The toxin BOAA is water-soluble. It can be removed by **steeping (soaking in hot water)** or **parboiling**. * **Lathyrism vs. Endemic Ascites:** Remember, Lathyrism affects the spinal cord (neurological), while Jhunjhunia/Crotalaria affects the liver (vascular). * **Safe Limit:** Khesari dal is considered safe if it constitutes less than 30% of the total daily calorie intake.

Question 265: What is the concentration of Vitamin A solution?

A. 25,000 IU per ml
B. 1,00,000 IU per ml (Correct Answer)
C. 50,000 IU per ml
D. 2,00,000 IU per ml

Explanation: **Explanation:** The correct answer is **B. 1,00,000 IU per ml**. Under the National Prophylaxis Programme against Nutritional Blindness in India, Vitamin A is administered as an oil-based solution. The standard concentration of this solution is **1,00,000 IU (International Units) per 1 ml**. This concentration is designed for ease of administration using a standard **2 ml spoon** provided with the bottle: * **Infants (6–11 months):** Receive a half-spoon dose (1 ml), equivalent to **1,00,000 IU**. * **Children (1–5 years):** Receive a full-spoon dose (2 ml), equivalent to **2,00,000 IU**. **Analysis of Incorrect Options:** * **Option A (25,000 IU/ml):** This is too dilute and would require large volumes (4–8 ml) to reach therapeutic levels, increasing the risk of aspiration in toddlers. * **Option C (50,000 IU/ml):** While 50,000 IU is the dose used for infants <6 months in specific clinical scenarios (e.g., measles), the standard prophylactic solution remains 1 lakh IU/ml. * **Option D (2,00,000 IU/ml):** This represents the total dose for a child >1 year, but not the concentration per ml. A 2 lakh IU/ml concentration would make the 1 ml infant dose too potent and difficult to measure accurately. **High-Yield Clinical Pearls for NEET-PG:** * **Schedule:** 1st dose at 9 months (with Measles/MR vaccine), then every 6 months until age 5. * **Total Doses:** A child receives a total of **9 doses** (1 lakh + 8 doses of 2 lakh). * **Total Cumulative Dose:** **17,00,000 IU** (17 Lakh IU). * **Storage:** Vitamin A is light-sensitive; it must be stored in dark/opaque bottles away from direct sunlight.

Question 266: What is the most sensitive test to detect argemone oil?

A. Paper chromatography (Correct Answer)
B. Nitric acid test
C. Nulgonda technique
D. Methylene blue reduction test

Explanation: ### Explanation **Correct Option: A. Paper Chromatography** Argemone oil is a common adulterant found in mustard oil, containing the toxic alkaloid **Sanguinarine**. While several tests exist, **Paper Chromatography** is the most sensitive method because it can detect argemone oil even at concentrations as low as **0.0001%**. It works by separating the alkaloids, which then exhibit a characteristic orange-yellow fluorescence under ultraviolet light. **Analysis of Incorrect Options:** * **B. Nitric Acid Test:** This is a traditional chemical test where a brownish-red color develops at the junction of the oil and nitric acid. While commonly used for screening, its sensitivity is much lower (detects up to 0.25%) compared to chromatography. * **C. Nalgonda Technique:** This is a method used for **defluoridation** of water at the community or household level using alum and lime. It is unrelated to oil adulteration. * **D. Methylene Blue Reduction Test (MBRT):** This test is used to assess the **microbiological quality of milk**. It measures the metabolic activity of bacteria; it is not used for detecting chemical adulterants in oil. **High-Yield Clinical Pearls for NEET-PG:** * **Epidemic Dropsy:** Consumption of argemone-adulterated oil leads to Epidemic Dropsy. * **Clinical Triad:** Bilateral pitting edema of legs, diarrhea, and dyspnea. * **Key Complication:** Glaucoma (specifically open-angle) is a classic late complication. * **Toxic Principle:** Sanguinarine (interferes with oxidation of pyruvic acid, leading to capillary dilatation and leakage). * **Rule of Thumb:** If a question asks for the *standard* or *common* test, think Nitric Acid; if it asks for the *most sensitive* or *confirmatory* test, choose Paper Chromatography.

Question 267: Which of the following is the richest source of Vitamin D?

A. Milk
B. Egg
C. Halibut liver oil (Correct Answer)
D. Butter

Explanation: **Explanation:** The correct answer is **Halibut liver oil**. Vitamin D is a fat-soluble vitamin primarily synthesized in the skin via UV-B radiation or obtained through specific dietary sources. Among natural food sources, **fish liver oils** are the most concentrated sources of Vitamin D. * **Halibut liver oil** contains approximately **2,000 to 30,000 IU** of Vitamin D per 100g, making it significantly more potent than Cod liver oil (approx. 10,000 IU/100g). * **Milk (Option A):** While often fortified in some countries, natural cow’s milk is a **poor source** of Vitamin D (containing only trace amounts). * **Egg (Option B):** Vitamin D is found in the **egg yolk**, but the concentration is relatively low (approx. 20–50 IU per yolk) compared to fish oils. * **Butter (Option C):** Butter contains small amounts of Vitamin D, but it is not considered a "rich" source. **High-Yield Clinical Pearls for NEET-PG:** 1. **Richest Source:** Halibut liver oil > Cod liver oil > Shark liver oil. 2. **Sunlight:** The primary source of Vitamin D for humans is the synthesis of Cholecalciferol (D3) in the skin from **7-dehydrocholesterol** by UV-B rays (290-315 nm). 3. **Daily Requirement:** The ICMR recommends an intake of **600 IU/day** for adults (with adequate sunlight exposure). 4. **Deficiency:** Leads to **Rickets** in children (craniotabes, rachitic rosary) and **Osteomalacia** in adults (bone pain, pseudofractures/Looser's zones). 5. **Toxicity:** Vitamin D is the most toxic vitamin in overdose, leading to hypercalcemia and ectopic calcification.

Question 268: The Nalgonda technique is primarily used for the prevention of dental caries by controlling the level of which of the following in drinking water?

A. Fluoride (Correct Answer)
B. Chloride
C. Nitrate
D. Nitrite

Explanation: ### Explanation **Correct Option: A (Fluoride)** The **Nalgonda technique** is a community-based method developed by the National Environmental Engineering Research Institute (NEERI), Nagpur, for the **defluoridation** of drinking water. It is specifically designed for use in rural areas where fluoride levels exceed the permissible limit (1.5 mg/L), leading to dental and skeletal fluorosis. The process involves the sequential addition of **Alum** (Aluminum sulfate), **Lime** (Calcium oxide), and **Bleaching powder** to water, followed by rapid mixing, flocculation, sedimentation, and filtration. Alum acts as the coagulant to remove fluoride, while lime ensures the correct pH and bleaching powder provides disinfection. **Analysis of Incorrect Options:** * **B (Chloride):** Excess chloride affects the taste and corrosivity of water but is not managed by the Nalgonda technique. Chloride levels are typically managed through reverse osmosis or distillation. * **C & D (Nitrate/Nitrite):** High nitrate levels in water can cause **Methemoglobinemia** (Blue Baby Syndrome). Removal usually requires ion exchange or biological denitrification, not the alum-lime process used for fluoride. **High-Yield Clinical Pearls for NEET-PG:** * **Ideal Fluoride Level:** 0.5–0.8 mg/L (prevents dental caries). * **Dental Fluorosis:** Occurs when levels exceed 1.5 mg/L (Mottling of enamel). * **Skeletal Fluorosis:** Occurs with prolonged intake of water containing 3–10 mg/L. * **Alternative Method:** The **Krutti technique** (using activated alumina) is another method for defluoridation, but Nalgonda remains the most cost-effective "household to community" level intervention in India. * **Sequence of Nalgonda:** Alum is added first, followed by Lime.

Question 269: Village Health Nutrition Day is observed:

A. Every week
B. Every month (Correct Answer)
C. Every 6 months
D. Every year

Explanation: **Explanation:** **Village Health Nutrition Day (VHND)** is a key community-based intervention under the National Health Mission (NHM) and the Integrated Child Health Services (ICDS). 1. **Why Option B is Correct:** VHND is mandated to be organized **once every month** (usually on a Wednesday) at the Anganwadi Centre (AWC). The primary objective is to provide a common platform for health, nutrition, and sanitation services. It serves as a "focal point" for service delivery to pregnant women, lactating mothers, and children under five. Key activities include immunization, antenatal care (ANC), growth monitoring, and nutrition counseling. 2. **Why Other Options are Incorrect:** * **Option A (Weekly):** While some health activities occur weekly (like Iron Folic Acid supplementation in schools), organizing a full-scale VHND weekly is logistically unfeasible for the ASHA, ANM, and AWW workforce. * **Options C & D (6 months/Yearly):** These intervals are too infrequent for critical interventions like routine immunization schedules and monthly growth monitoring of infants, which are essential components of VHND. 3. **High-Yield Facts for NEET-PG:** * **The Trio:** VHND is a collaborative effort between three frontline workers: the **ANM** (Auxiliary Nurse Midwife), the **ASHA** (Accredited Social Health Activist), and the **AWW** (Anganwadi Worker). * **Location:** Always at the **Anganwadi Centre**. * **Services Provided:** The "5+1" services: Registration/ANC, Immunization, Growth Monitoring, Vitamin A prophylaxis, Family Planning, and Health Education. * **Monitoring:** The **Mother and Child Protection (MCP) Card** is the primary tool used during VHND to track the health status of the beneficiaries.

Question 270: What is the additional daily energy requirement during pregnancy and lactation, respectively?

A. 350 kcals, 350 kcals
B. 350 kcals, 600 kcals (Correct Answer)
C. 450 kcals, 600 kcals
D. 450 kcals, 350 kcals

Explanation: ### Explanation The nutritional requirements of a woman increase significantly during pregnancy and lactation to support fetal growth, placental development, and milk production. According to the **ICMR-NIN (2020) guidelines**, which are the standard for NEET-PG: 1. **Pregnancy:** An additional **+350 kcal/day** is required. This energy is essential for the expansion of maternal tissues (blood volume, uterus, breasts) and the growth of the fetus. 2. **Lactation:** The energy demand is even higher than in pregnancy to sustain exclusive breastfeeding. For the first 6 months (0–6 months), an additional **+600 kcal/day** is recommended. For 6–12 months, the requirement is **+520 kcal/day**. **Analysis of Options:** * **Option B (Correct):** Accurately reflects the ICMR-NIN 2020 recommendations (+350 kcal for pregnancy and +600 kcal for early lactation). * **Option A:** Incorrect. While 350 kcal is correct for pregnancy, it underestimates the metabolic cost of milk production in lactation. * **Option C & D:** Incorrect. 450 kcal is not the standard recommendation for pregnancy in the Indian context (though some international guidelines like WHO/CDC suggest +450 kcal specifically for the *third trimester*). **High-Yield Clinical Pearls for NEET-PG:** * **Protein Requirements (ICMR 2020):** * Pregnancy: +9.5 g (2nd trimester), +22.0 g (3rd trimester). * Lactation: +17.0 g (0–6 months), +13.0 g (6–12 months). * **Iron:** Requirement increases to **27 mg/day** during pregnancy. * **Calcium:** Requirement is **1000 mg/day** for both pregnant and lactating women. * **Weight Gain:** A healthy woman with a normal BMI should ideally gain **10–12 kg** during pregnancy.

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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