Nutrition and Health — MCQs

Nutrition and Health Indian Medical PG Practice Questions and MCQs

Question 211: Which amino acid is deficient in maize?

A. Tryptophan (Correct Answer)
B. Threonine
C. Methionine
D. Leucine

Explanation: **Explanation:** The nutritional quality of a cereal is determined by its limiting amino acids. **Maize (corn)** is notoriously deficient in two essential amino acids: **Tryptophan** and **Lysine**. 1. **Why Tryptophan is the correct answer:** Tryptophan is the precursor for the synthesis of Niacin (Vitamin B3). In populations where maize is the staple diet, the lack of dietary tryptophan leads to a secondary deficiency of Niacin. This clinically manifests as **Pellagra**, characterized by the "4 Ds": Dermatitis (Casal’s necklace), Diarrhea, Dementia, and Death. 2. **Why the other options are incorrect:** * **Threonine:** This is generally not a limiting amino acid in major cereals like maize or wheat. * **Methionine:** This is a sulfur-containing amino acid. While pulses (legumes) are deficient in Methionine, cereals are actually **rich in Methionine**. This is the basis for "Pulse-Cereal supplementation" to achieve a balanced protein profile. * **Leucine:** Maize actually contains **high levels of Leucine**. High leucine levels interfere with the conversion of tryptophan to niacin, further exacerbating the risk of Pellagra in maize eaters. **High-Yield Clinical Pearls for NEET-PG:** * **Limiting Amino Acids:** * Cereals (Rice, Wheat, Maize): Deficient in **Lysine**. * Pulses: Deficient in **Methionine**. * Maize (Specific): Deficient in **Tryptophan AND Lysine**. * **Pellagra Association:** Always associate a "Maize-based diet" with Tryptophan deficiency and Pellagra. * **Fortification:** To improve the biological value of maize, it is often fortified with lysine and tryptophan (e.g., Quality Protein Maize).

Question 212: Which BMI level in men is considered lethal?

A. 11
B. 13 (Correct Answer)
C. 12
D. 15

Explanation: **Explanation:** The correct answer is **13**. This value represents the critical threshold for survival in adult males regarding severe energy deficiency. **1. Underlying Medical Concept:** Body Mass Index (BMI) is a proxy for nutritional status. While the WHO classifies a BMI <18.5 kg/m² as underweight, there is a lower physiological limit beyond which the body can no longer maintain vital functions (such as thermogenesis and organ integrity). In adult males, a **BMI of 13** is generally considered the **lethal limit**. At this stage, the body has exhausted its fat stores and significant muscle wasting (protein catabolism) occurs, leading to multi-organ failure or fatal cardiac arrhythmias. **2. Analysis of Options:** * **Option B (13):** This is the established lethal limit for **men**. (Note: For women, the lethal limit is slightly lower, approximately **11**, due to a naturally higher essential body fat percentage). * **Option A (11):** This is considered the lethal BMI limit for **women**, not men. * **Option C (12):** While extremely dangerous and indicative of severe malnutrition, it is not the standard textbook threshold cited for male lethality. * **Option D (15):** A BMI of 15 indicates "Severe Thinness" (Grade III Malnutrition), but it is not immediately lethal; patients at this level are candidates for intensive nutritional rehabilitation. **3. High-Yield Facts for NEET-PG:** * **WHO BMI Classification:** * Normal: 18.5–24.9 * Overweight: 25–29.9 * Obese: ≥30 * **Malnutrition Grading (BMI):** * Mild (Grade I): 17.0–18.49 * Moderate (Grade II): 16.0–16.99 * Severe (Grade III): <16.0 * **Lethal Limits:** Men ≈ 13 | Women ≈ 11. * **Ponderal Index:** $Weight (kg) / Height (m)^3$ (An alternative to BMI).

Question 213: Iodised oil (usual dose of 1 ml intramuscularly) gives protection for how long?

A. 3-4 years (Correct Answer)
B. 3-4 months
C. 3-4 weeks
D. 10-12 years

Explanation: ### Explanation **1. Why Option A is Correct:** Iodised oil (Lipiodol) is a long-acting preparation used in the prevention and control of Iodine Deficiency Disorders (IDD), particularly in areas where iodized salt distribution is not feasible. When administered **intramuscularly (1 ml)**, the oil forms a depot in the muscle tissue. The iodine is slowly released into the bloodstream, providing effective protection against goiter and cretinism for a period of **3 to 4 years**. If administered orally, the same dose provides a shorter duration of protection (approximately 1–2 years). **2. Why Other Options are Incorrect:** * **Options B & C (3-4 months/weeks):** These durations are too short. The primary advantage of using an oil-based depot injection is its sustained-release property, which eliminates the need for frequent dosing. * **Option D (10-12 years):** No single dose of iodized oil provides protection for a decade. After 4 years, the iodine stores are typically depleted below protective levels, requiring a repeat dose. **3. High-Yield Clinical Pearls for NEET-PG:** * **Target Group:** The priority group for iodized oil injections are women of childbearing age and children. * **Iodized Salt:** This remains the **"Gold Standard"** and the most common method of mass prophylaxis (recommended level: 30 ppm at production, 15 ppm at consumer level). * **Monitoring:** The best indicator for monitoring the impact of an iodine control program in a community is **Urinary Iodine Excretion (UIE)**. * **Neonatal Hypothyroidism:** This is the most sensitive indicator for environmental iodine deficiency. * **Goiter Prevalence:** A community is considered "endemic" for goiter if the prevalence is **>5%** among school-aged children (6-12 years).

Question 214: According to the WHO, what is the BMI definition for malnutrition?

A. Below 18 kg/m2
B. Below 18.5 kg/m2 (Correct Answer)
C. Below 19 kg/m2
D. Below 19.5 kg/m2

Explanation: **Explanation:** The Body Mass Index (BMI), also known as the **Quetelet Index**, is the standard international metric 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 B is Correct:** According to the World Health Organization (WHO) and the Global Database on Body Mass Index, a BMI of **less than 18.5 $kg/m^2$** is the official threshold for defining **underweight** or chronic energy deficiency (malnutrition) in adults. This cutoff is based on increased risks of morbidity and mortality observed in populations falling below this level. **Analysis of Incorrect Options:** * **Option A (Below 18):** While close, this is not the standardized WHO cutoff. However, a BMI <18.5 is further sub-classified, where 17.0–18.49 is mild thinness, 16.0–16.99 is moderate thinness, and <16.0 is severe thinness. * **Options C & D (Below 19/19.5):** These values are not recognized by the WHO for defining malnutrition. In some clinical settings, a BMI of 19–20 might be considered "low normal," but they do not meet the criteria for the diagnosis of underweight. **High-Yield Clinical Pearls for NEET-PG:** * **Asian-Indian Cutoffs:** Due to a higher predisposition to visceral fat and metabolic syndrome, the consensus BMI cutoffs for **Indians** are lower: * **Underweight:** <18.5 $kg/m^2$ * **Normal:** 18.5–22.9 $kg/m^2$ * **Overweight:** 23–24.9 $kg/m^2$ * **Obesity:** $\geq$25 $kg/m^2$ * **Ponderal Index:** Another measure of leaness ($Weight/Height^3$). * **Best Indicator of Childhood Nutrition:** Weight-for-height (Wasting) indicates acute malnutrition; Height-for-age (Stunting) indicates chronic malnutrition.

Question 215: Which of the following is not an indicator of a significant xerophthalmia problem in the community?

A. Night blindness >1%
B. Bitot's spots >0.05%
C. Corneal ulcer >0.05%
D. None of the above (Correct Answer)

Explanation: **Explanation:** This question tests the knowledge of **WHO prevalence criteria** for determining if Vitamin A deficiency (Xerophthalmia) is a significant public health problem in a community. The WHO has established specific "cut-off points" for various clinical signs; if the prevalence in children aged 6–71 months exceeds these limits, the problem is considered significant. **Why "None of the above" is correct:** All the values mentioned in the options are the standard WHO threshold criteria. Since all three options (A, B, and C) represent valid indicators of a significant public health problem, none of them can be classified as "not an indicator." **Analysis of Options:** * **A. Night blindness (XN) > 1%:** This is the earliest clinical sign. If more than 1% of the vulnerable pediatric population is affected, it indicates a public health problem. * **B. Bitot’s spots (X1B) > 0.5%:** (Note: The question lists 0.05%, but in the context of standard NEET-PG patterns, this is often a typographical check or refers to the specific threshold for Bitot's spots being >0.5%). If Bitot's spots exceed 0.5%, it is a significant indicator. * **C. Corneal ulcer/Keratomalacia (X3A/X3B) > 0.01%:** The threshold for active corneal lesions is very low because they represent a medical emergency. If the prevalence is >0.01%, it is significant. (Option C lists 0.05%, which is higher than the minimum threshold, thus making it a valid indicator of a "significant" problem). **High-Yield Clinical Pearls for NEET-PG:** * **WHO Criteria Summary (Prevalence >):** * Night Blindness (XN): **> 1%** * Bitot's Spots (X1B): **> 0.5%** * Corneal Xerosis/Ulcer/Keratomalacia (X2/X3A/X3B): **> 0.01%** * Corneal Scar (XS): **> 0.05%** * Serum Retinol (<0.7 µmol/L): **> 5%** * **First clinical sign:** Night Blindness. * **First objective sign:** Conjunctival Xerosis. * **Treatment:** 2 lakh IU of Vitamin A orally on Days 0, 1, and 14 (half dose for infants 6-12 months).

Question 216: Which ministry sponsors the Integrated Child Development Services (ICDS) scheme?

A. Ministry of Health and Family Welfare
B. Ministry of Social Welfare (Correct Answer)
C. Ministry of Education
D. None of the above

Explanation: **Explanation:** The **Integrated Child Development Services (ICDS)** scheme, launched on October 2, 1975, is one of the world’s largest programs for early childhood care and development. **1. Why Ministry of Social Welfare is correct:** The ICDS scheme was originally launched and is currently administered by the **Ministry of Women and Child Development** (formerly a department under the **Ministry of Social Welfare**). The scheme is designed as a multi-sectoral program to improve the nutritional and health status of children (0-6 years) and pregnant/lactating mothers. While it provides health services, its core administrative framework—including the Anganwadi system, supplementary nutrition, and non-formal pre-school education—falls under the social welfare umbrella to ensure holistic child protection and development. **2. Why other options are incorrect:** * **Ministry of Health and Family Welfare (MoHFW):** While MoHFW provides the technical support for the "Health" component of ICDS (immunization, health check-ups, and referral services) through the NRHM/NHM infrastructure, it is **not** the sponsoring or administrative ministry. * **Ministry of Education:** Although ICDS includes "Pre-school non-formal education," this is considered a developmental milestone rather than formal schooling, thus it does not fall under the Ministry of Education. **High-Yield Clinical Pearls for NEET-PG:** * **Beneficiaries:** Children <6 years, Pregnant and Lactating mothers, and Adolescent girls (under the Sabla scheme). * **The Anganwadi Worker (AWW):** The community-level frontline worker for ICDS (1 AWW per 400–800 population). * **Service Package:** Includes 6 services: Supplementary nutrition, Immunization, Health check-up, Referral services, Pre-school non-formal education, and Nutrition & Health education. * **Funding:** It is a Centrally Sponsored Scheme implemented by State Governments/UTs.

Question 217: What is the process of defluoridation of water?

A. Nalgonda technique (Correct Answer)
B. National Institute of Nutrition (NIN) method
C. Sand filter
D. Parboiling

Explanation: **Explanation:** **1. Why Nalgonda Technique is Correct:** The **Nalgonda technique**, developed by the National Environmental Engineering Research Institute (NEERI), is the most widely used method for defluoridation of water in India. It involves the sequential addition of **Alum (Aluminium sulphate)**, **Lime (Calcium oxide)**, and **Bleaching powder** to water, followed by rapid mixing, flocculation, sedimentation, and filtration. Alum acts as the coagulant to remove fluoride ions, while lime ensures the correct pH and bleaching powder provides disinfection. It is preferred because it is cost-effective and adaptable at both domestic and community levels. **2. Why Other Options are Incorrect:** * **National Institute of Nutrition (NIN) method:** While NIN conducts extensive research on nutrition and fluorosis, there is no specific "NIN method" for water defluoridation. * **Sand Filter:** This is a physical filtration method used primarily to remove suspended solids, turbidity, and some microorganisms (as seen in Slow Sand or Rapid Sand Filters). It is ineffective at removing dissolved chemical ions like fluoride. * **Parboiling:** This is a hydrothermal process applied to paddy (rice) to improve its nutritional value (conserving Vitamin B12/Thiamine) and milling quality. It has no role in water purification. **3. High-Yield Clinical Pearls for NEET-PG:** * **Safe Fluoride Levels:** The ideal level in drinking water is **0.5–0.8 mg/L**. * **Dental Fluorosis:** Occurs when levels exceed **1.5 mg/L**. * **Skeletal Fluorosis:** Occurs with prolonged intake of water containing **3–6 mg/L** of fluoride. * **Alternative Method:** The **Krassane Method** (using activated alumina) is another technique for defluoridation. * **Clinical Sign:** "Mottling of enamel" is the earliest sign of dental fluorosis.

Question 218: Lathyrism is seen with eating of:

A. Red gram
B. Kesari dhal (Correct Answer)
C. Mushrooms
D. Sausages

Explanation: **Explanation:** **Lathyrism** is a form of permanent spastic paralysis caused by the excessive consumption of **Kesari dhal (*Lathyrus sativus*)**. It is a classic topic in Community Medicine, often linked to socio-economic factors where this hardy, drought-resistant pulse becomes a staple diet during famines. 1. **Why Kesari dhal is correct:** The seeds of *Lathyrus sativus* contain a potent neurotoxin called **BOAA (Beta-oxalyl-amino-alanine)**, also known as ODAP. Chronic ingestion (usually >300g daily for 6 months) leads to the destruction of upper motor neurons in the spinal cord, resulting in **Neurolathyrism**. This presents as a gradual onset of spastic paraplegia, characterized by a "scissor gait." 2. **Why other options are incorrect:** * **Red gram:** Also known as Arhar dhal, it is a common protein source and does not contain neurotoxins. * **Mushrooms:** Ingestion of poisonous mushrooms (e.g., *Amanita phalloides*) causes **Mycetism**, leading to acute gastrointestinal or hepatic failure, not lathyrism. * **Sausages:** Improperly preserved sausages are associated with **Botulism** (caused by *Clostridium botulinum* toxin), which presents as acute flaccid paralysis, the opposite of the spasticity seen in 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)** or **parboiling**. * **Legal aspect:** The PFA Act once banned Kesari dhal, but newer low-BOAA varieties are being developed. * **Differential:** Do not confuse with **Endemic Ascites**, which is caused by Pyrrolizidine alkaloids in *Jhansia* (Crotalaria) seeds contaminating millet.

Question 219: As per ICDS, what is the recommended daily intake of calories and proteins for children aged 3-6 years?

A. 200 kcal and 10 gm of proteins
B. 300 kcal and 10 gm of proteins
C. 250 kcal and 10 gm of proteins
D. 500 kcal and 15 gm of proteins (Correct Answer)

Explanation: **Explanation:** The Integrated Child Development Services (ICDS) scheme provides supplementary nutrition to bridge the gap between the actual average intake and the recommended dietary allowance (RDA). For children aged **3 to 6 years**, the supplementary nutrition is provided in the form of a morning snack and a Hot Cooked Meal (HCM). **1. Why Option D is Correct:** According to the revised nutritional norms of the ICDS (under the POSHAN Abhiyaan), the daily supplementary nutrition for children in the 3–6 years age group must provide **500 kcal of energy and 12–15 grams of protein**. This is designed to meet approximately 1/3rd of their daily calorie requirement and 1/2 of their daily protein requirement. **2. Analysis of Incorrect Options:** * **Options A, B, and C:** These values are outdated or represent older guidelines. Previously, the norm for children was 300 kcal and 8–10g of protein. However, current guidelines have scaled these requirements upward to combat malnutrition more effectively. * **Note on 300 kcal/10g protein:** This specific value (300 kcal/8-10g protein) is now the standard for children aged **6 months to 72 months (6 years)** under the "Take Home Ration" (THR) category, but for the 3-6 year old group attending Anganwadis, the 500 kcal/15g protein standard is the specific target for the combined snack and meal. **3. High-Yield Facts for NEET-PG:** * **Severely Malnourished Children (6m–6y):** They receive **800 kcal and 20–25g of protein**. * **Pregnant & Lactating Mothers:** They receive **600 kcal and 18–20g of protein**. * **Adolescent Girls (SABLA):** They receive **600 kcal and 18–20g of protein**. * **Costing:** The financial norm is currently ₹8.00 per child per day for normal children and ₹12.00 for severely malnourished children. * **Beneficiaries:** ICDS covers children (0-6 years), pregnant women, and lactating mothers.

Question 220: Maternal zinc deficiency is associated with which of the following complications?

A. Anencephaly
B. Low birth weight
C. Spontaneous abortion
D. All of the above (Correct Answer)

Explanation: **Explanation:** Zinc is an essential trace element required for DNA synthesis, cell division, and protein synthesis. During pregnancy, it plays a critical role in rapid fetal growth and organogenesis. Maternal zinc deficiency leads to impaired cellular growth and structural abnormalities, manifesting in several adverse outcomes. **Why "All of the Above" is Correct:** 1. **Congenital Malformations (Anencephaly):** Zinc is vital for neural tube closure. Deficiency is a known risk factor for Neural Tube Defects (NTDs) like anencephaly and spina bifida, as it impairs the enzymes required for genomic stability. 2. **Low Birth Weight (LBW):** Zinc is a co-factor for over 300 enzymes (including alkaline phosphatase and RNA polymerase). Deficiency restricts fetal growth (IUGR) and is strongly associated with low birth weight and prematurity. 3. **Spontaneous Abortion:** Severe zinc deficiency can lead to early embryonic loss or miscarriage due to chromosomal instability and oxidative stress within the uterine environment. **Clinical Pearls for NEET-PG:** * **Acrodermatitis Enteropathica:** An autosomal recessive disorder of zinc absorption characterized by the triad of alopecia, diarrhea, and vesiculobullous dermatitis (periorificial and acral). * **Zinc & Diarrhea:** WHO/UNICEF recommend 20 mg of zinc supplementation for 10–14 days for children with acute diarrhea (10 mg for infants <6 months) to reduce severity and recurrence. * **Hypogonadism:** Zinc deficiency is a classic cause of delayed puberty and hypogonadism in adolescent males. * **Immunity:** It is essential for T-lymphocyte function; deficiency leads to impaired cell-mediated immunity and increased susceptibility to infections.

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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