Nutrition and Health — MCQs

Nutrition and Health Indian Medical PG Practice Questions and MCQs

Question 241: What is the recommended daily folic acid supplementation during lactation?

A. 150 mcg/d (Correct Answer)
B. 100 mcg/d
C. 400 mcg/d
D. 450 mcg/d

Explanation: ### Explanation The correct answer is **150 mcg/d**. **1. Why 150 mcg/d is correct:** According to the **ICMR-NIN (2020/2024) Dietary Guidelines**, the Recommended Dietary Allowance (RDA) for folic acid varies significantly across different physiological states. For a non-pregnant, non-lactating adult woman, the requirement is **200 mcg/d**. During **lactation**, the requirement increases by an additional **150 mcg/d** (Total: 350 mcg/d) to compensate for the folate secreted in breast milk and to maintain maternal stores. **2. Why the other options are incorrect:** * **100 mcg/d:** This is the daily dose of elemental iron (not folic acid) provided in the National Iron Plus Initiative (NIPI) for pregnant and lactating women. * **400 mcg/d:** This is the recommended *additional* intake during **pregnancy** (Total: 200 + 400 = 600 mcg/d) to prevent neural tube defects (NTDs) and support fetal growth. * **450 mcg/d:** This does not correspond to any standard ICMR recommendation for folic acid in the peripartum period. **3. High-Yield Clinical Pearls for NEET-PG:** * **Pre-conception:** To prevent NTDs, 400 mcg (0.4 mg) of folic acid should be started at least 1 month before conception and continued through the first trimester. * **High-risk cases:** Women with a previous history of a child with NTD require a higher dose of **4 mg/d**. * **IFA Program (India):** Under the *Anemia Mukt Bharat* strategy, pregnant and lactating women receive **60 mg Iron + 500 mcg Folic Acid** daily for 180 days. * **Folate vs. Folic Acid:** Folate is the natural form (food), while folic acid is the synthetic form used in supplements (higher bioavailability).

Question 242: How is the Protein Energy Ratio (PER) in a diet expressed?

A. (Energy in diet / Protein in diet) x 100
B. (Protein energy in diet / Total energy in diet) x 100 (Correct Answer)
C. (Protein energy in diet / Total energy in diet) x 100
D. (Total energy consumed / Total protein consumed) x 100

Explanation: ### Explanation The **Protein Energy Ratio (PER)** is a critical indicator used in public health nutrition to assess the quality of a diet and its adequacy in meeting protein requirements relative to total caloric intake. **1. Why Option B/C is Correct:** The Protein Energy Ratio is defined as the proportion of total dietary energy derived from proteins. Since 1 gram of protein yields approximately 4 kcal, the formula calculates the energy contributed by protein as a percentage of the total energy (calories) provided by all macronutrients (carbohydrates, fats, and proteins) in the diet. * **Formula:** $\frac{\text{Energy from Protein (kcal)}}{\text{Total Energy in Diet (kcal)}} \times 100$ **2. Why Other Options are Incorrect:** * **Option A & D:** These options place "Energy" or "Total Energy" in the numerator or suggest a simple weight-to-energy ratio. PER is specifically a **percentage of energy**, not a ratio of grams to calories or a reciprocal of energy density. **3. High-Yield Clinical Pearls for NEET-PG:** * **Safe Levels:** For an average adult, a PER of **8–10%** is considered adequate. * **Vulnerable Groups:** For pregnant and lactating women, the recommended PER increases to approximately **11–12%** to support tissue growth and milk production. * **Protein Quality:** While PER measures quantity, the **Net Protein Utilization (NPU)** is the standard for measuring protein quality. * **Reference Protein:** Egg protein is considered the "Reference Protein" with a Biological Value of 100. * **Kwashiorkor vs. Marasmus:** Kwashiorkor is primarily a deficiency of protein (low PER), whereas Marasmus is a deficiency of total energy (calories).

Question 243: Which of the following is NOT a characteristic of Reduced Osmolarity Oral Rehydration Solution (ORS)?

A. Sodium 75 mmol/litre
B. Potassium 20 mmol/litre
C. Chloride 45 mmol/litre (Correct Answer)
D. Osmolarity 245 mmol/litre

Explanation: **Explanation** The WHO and UNICEF recommended the **Reduced Osmolarity ORS** in 2002 to replace the standard ORS. This change was aimed at reducing the need for intravenous fluids, decreasing stool output, and minimizing the incidence of vomiting in children with non-cholera diarrhea. **Why Option C is the Correct Answer:** The Chloride content in Reduced Osmolarity ORS is **65 mmol/L**, not 45 mmol/L. Therefore, Option C is the incorrect statement regarding the composition. The reduction in chloride (from 80 mmol/L in the old formula to 65 mmol/L) helps in achieving the lower total osmolarity. **Analysis of Incorrect Options:** * **Option A (Sodium 75 mmol/L):** This is a key feature. The sodium concentration was reduced from 90 mmol/L to 75 mmol/L to prevent hypernatremia. * **Option B (Potassium 20 mmol/L):** This remains unchanged from the original formula. Potassium is essential to replace losses and prevent hypokalemia during diarrhea. * **Option D (Osmolarity 245 mOsm/L):** This is the total osmolarity of the new formula (reduced from 311 mOsm/L). Lower osmolarity enhances water absorption and prevents osmotic aggravation of diarrhea. **High-Yield NEET-PG Pearls:** * **Composition of Reduced Osmolarity ORS (per litre):** * Sodium Chloride: 2.6 g * Glucose (Anhydrous): 13.5 g * Potassium Chloride: 1.5 g * Trisodium Citrate: 2.9 g * **Molar Concentrations:** Sodium (75), Chloride (65), Glucose (75), Potassium (20), Citrate (10). **Total Osmolarity = 245 mmol/L.** * **Glucose:Sodium Ratio:** Always **1:1** in the new formula to optimize the SGLT-1 co-transport mechanism in the small intestine. * **Trisodium Citrate:** Preferred over Bicarbonate because it increases the shelf life of ORS packets.

Question 244: Which of the following is NOT true regarding fluorosis?

A. Fluorosis is the most common cause of dental caries in children. (Correct Answer)
B. Fluorosis can cause fluoride deposition in bones.
C. Defluoridation is done by the Nalgonda technique.
D. Fluorosis can cause genu valgum.

Explanation: ### Explanation **1. Why Option A is the Correct Answer (The "False" Statement):** Fluorosis is **not** a cause of dental caries; in fact, fluoride is **protective** against dental caries. At optimal levels (0.5–0.8 mg/L), fluoride prevents tooth decay by strengthening enamel. Dental fluorosis occurs when there is excessive intake of fluoride (usually >1.5 mg/L) during the period of tooth development. While it causes mottling and discoloration of teeth, it does not cause caries. The most common cause of dental caries in children is poor oral hygiene and excessive consumption of fermentable carbohydrates (sugars). **2. Analysis of Other Options:** * **Option B (Fluoride deposition in bones):** This is true. Chronic ingestion of high levels of fluoride (typically >3–10 mg/L) leads to **Skeletal Fluorosis**, where fluoride replaces calcium in the bone matrix, leading to increased bone density (osteosclerosis) and calcification of ligaments. * **Option C (Nalgonda technique):** This is true. Developed by NEERI, Nagpur, the Nalgonda technique is the most common method for community-level defluoridation. It involves the sequential addition of **Alum** and **Lime**, followed by sedimentation and filtration. * **Option D (Genu valgum):** This is true. "Knock-knees" or **Genu Valgum** is a characteristic manifestation of endemic fluorosis, particularly seen in the "Genu Valgum Syndrome" (often associated with osteoporosis and seen in parts of South India like Andhra Pradesh). ### NEET-PG High-Yield Pearls: * **Safe Limit of Fluoride in Water:** 0.5–0.8 mg/L (WHO recommends up to 1.5 mg/L). * **Dental Fluorosis:** Occurs when levels exceed 1.5 mg/L. * **Skeletal Fluorosis:** Occurs with long-term exposure to levels >3 mg/L. * **Nalgonda Technique Chemicals:** Alum (flocculation), Lime (disinfection/pH), and Bleaching powder. * **Biomarkers:** Urinary fluoride is the best indicator of recent fluoride exposure.

Question 245: Under the Prevention of Food Adulteration Act, the minimum expected level of iodine in iodized salt at the production level is:

A. 30 ppm (Correct Answer)
B. 25 ppm
C. 20 ppm
D. 15 ppm

Explanation: ### Explanation **1. Why 30 ppm is the Correct Answer:** Under the **Prevention of Food Adulteration (PFA) Act** (now incorporated under FSSAI), the National Iodine Deficiency Disorders Control Programme (NIDDCP) mandates specific iodine levels to ensure adequate intake despite losses during transit and storage. The minimum iodine content is fixed at **30 ppm (parts per million) at the production level** (manufacturer level). This higher concentration accounts for the inevitable degradation of iodine due to environmental factors like heat and humidity before it reaches the consumer. **2. Analysis of Incorrect Options:** * **Option B (25 ppm) & C (20 ppm):** These are intermediate values that do not correspond to the statutory requirements set by the Indian government for salt iodization. * **Option D (15 ppm):** This is a common distractor. While 30 ppm is required at the production level, **15 ppm** is the minimum required iodine level at the **consumer level** (retail/household level). The 50% reduction from production to consumption is the calculated "margin of loss." **3. High-Yield Clinical Pearls for NEET-PG:** * **Daily Requirement:** The average adult requires about **150 μg** of iodine daily. * **Indicator of Iodine Status:** The most sensitive indicator for monitoring recent iodine intake in a community is **Urinary Iodine Excretion (UIE)**. A median UIE of **100–199 μg/L** indicates adequate iodine nutrition. * **Goiter Rate:** A community is said to have endemic goiter if the Total Goiter Rate (TGR) is **>5%** among primary school-age children (6–12 years). * **Monitoring:** At the household level, iodine levels in salt are typically tested using **Rapid Diagnostic Kits (MBI kits)**, which show a color change (blue/purple) in the presence of iodine.

Question 246: According to the World Health Organization (WHO), what is the cutoff for anemia in adult males?

A. 13 g/dL (Correct Answer)
B. 12 g/dL
C. 11 g/dL
D. 10 g/dL

Explanation: **Explanation:** The diagnosis of anemia is based on hemoglobin (Hb) levels falling below the established physiological needs of an individual, which vary by age, sex, and physiological status (like pregnancy). According to **WHO criteria**, the cutoff for anemia in **adult males (≥15 years) is <13 g/dL**. This higher threshold for men is primarily due to the stimulatory effect of androgens on erythropoiesis and the absence of menstrual blood loss. **Analysis of Options:** * **Option A (13 g/dL):** Correct. This is the global standard set by the WHO for adult men. * **Option B (12 g/dL):** Incorrect. This is the cutoff for **non-pregnant adult females** (≥15 years). * **Option C (11 g/dL):** Incorrect. This is the cutoff for **pregnant women** and children aged **6–59 months**. * **Option D (10 g/dL):** Incorrect. While not a diagnostic cutoff for anemia presence, <10 g/dL is often used to classify "moderate" anemia (7.0–9.9 g/dL). **High-Yield NEET-PG Pearls:** 1. **WHO Classification of Anemia Severity (Adults):** * **Mild:** 11.0 g/dL to cutoff (12.9 for men, 11.9 for women). * **Moderate:** 7.0–9.9 g/dL. * **Severe:** <7.0 g/dL. 2. **Public Health Significance:** Anemia is considered a "severe" public health problem if the prevalence in a population is **≥40%**. 3. **Altitude Adjustment:** Hb cutoffs increase as altitude increases (>1000m) to compensate for lower oxygen partial pressure. 4. **Smokers:** Hb cutoffs are higher for smokers due to increased carboxyhemoglobin levels.

Question 247: Which of the following represents international food standards?

A. Bureau of Indian Standards (BIS) standards
B. Codex Alimentarius standards (Correct Answer)
C. Agricultural Mark (AgMark) standards
D. Prevention of Food Adulteration (PFA) standards

Explanation: ### Explanation **Correct Answer: B. Codex Alimentarius standards** The **Codex Alimentarius** (Latin for "Food Code") is a collection of internationally recognized standards, codes of practice, and guidelines relating to food, food production, and food safety. It was established in 1963 by the **Food and Agriculture Organization (FAO)** and the **World Health Organization (WHO)**. Its primary objectives are to protect consumer health and ensure fair practices in international food trade. It serves as the global reference point for consumers, food producers, and national food control agencies. **Why other options are incorrect:** * **Bureau of Indian Standards (BIS):** This is the National Standards Body of India. While it covers food products (like ISI marks on bottled water), it is a national body, not an international one. * **Agricultural Mark (AgMark):** This is a certification mark employed on agricultural products in **India**. It ensures quality based on the Agricultural Produce (Grading and Marking) Act of 1937. * **Prevention of Food Adulteration (PFA):** This was an Indian Act (1954) aimed at ensuring pure food supply to consumers. It has since been repealed and replaced by the **FSSAI** (Food Safety and Standards Authority of India) Act, 2006. **High-Yield Facts for NEET-PG:** * **FSSAI (2006):** The current apex body for food safety in India, consolidating various older acts like PFA and AgMark. * **ISI Mark:** Issued by BIS; mandatory for items like infant foods and packaged drinking water. * **Consumer Protection:** While Codex is international, the **Consumer Protection Act (1986)** is the primary legal tool for consumer rights in India. * **Nutritional Surveillance:** Remember that the **National Institute of Nutrition (NIN)**, Hyderabad, sets the Recommended Dietary Allowances (RDA) for Indians.

Question 248: The WHO Multicentre Growth Reference Study (MGRS) is a landmark study. Which of the following statements about the MGRS is NOT true?

A. Participating countries included India, Brazil, Ghana, Oman, USA, and Norway.
B. It was conducted as a case-control study. (Correct Answer)
C. The age group studied was 1-10 years.
D. A total of 8500 breastfed infants and young children participated.

Explanation: ### Explanation The **WHO Multicentre Growth Reference Study (MGRS)** was conducted between 1997 and 2003 to develop new growth standards that describe how children *should* grow under optimal conditions, rather than just describing how they *do* grow in a specific time or place. **Why Option B is the Correct Answer (The False Statement):** The MGRS was **not** a case-control study. It was a **longitudinal follow-up study** (from birth to 24 months) combined with a **cross-sectional survey** (from 18 to 71 months). This design allowed for the tracking of individual growth velocities while ensuring a large enough sample size for older age groups. **Analysis of Other Options:** * **Option A (True):** The study was global and included six diverse countries to ensure the standards were applicable worldwide: **India** (New Delhi), **Brazil**, **Ghana**, **Oman**, **USA**, and **Norway**. * **Option C (False/Note):** While the question lists 1-10 years, the actual MGRS studied children from **0 to 5 years (0-60 months)**. However, in the context of multiple-choice questions, Option B is the "most" incorrect because the study design is a fundamental epidemiological mismatch. * **Option D (True):** Approximately **8,500** children were included. A key inclusion criterion was that infants had to be **exclusively or predominantly breastfed** for at least 4 to 6 months. **High-Yield Clinical Pearls for NEET-PG:** * **Prescriptive vs. Descriptive:** The MGRS is *prescriptive* (sets a standard); previous charts (like NCHS) were *descriptive* (sets a reference). * **Standard Growth Charts:** The WHO 2006 Growth Charts (derived from MGRS) are the current gold standard used in India under the **ICDS program**. * **Key Indicators:** Weight-for-age (Underweight), Height-for-age (Stunting), and Weight-for-height (Wasting). * **The "Gold Standard" Child:** MGRS criteria included: No health constraints, non-smoking mothers, and optimal feeding practices (breastfeeding).

Question 249: Which of the following is not considered a body-building food?

A. Milk
B. Egg
C. Groundnut
D. Fruits (Correct Answer)

Explanation: ### Explanation In Community Medicine and Nutrition, foods are traditionally classified into three functional categories based on their primary nutrient contribution: 1. **Energy Yielding Foods:** Rich in carbohydrates and fats (e.g., Cereals, sugar, oils). 2. **Body-Building Foods:** Rich in **proteins**, essential for growth, tissue repair, and maintenance. 3. **Protective Foods:** Rich in vitamins and minerals, essential for immunity and metabolic regulation. **Why Fruits is the Correct Answer:** Fruits are primarily classified as **Protective Foods**. While they provide essential vitamins (like Vitamin C and A), minerals, and antioxidants, they are very low in protein content. Therefore, they do not contribute significantly to "body-building" or tissue synthesis. **Analysis of Incorrect Options:** * **Milk:** An animal-based protein source containing all essential amino acids. It is a classic body-building food, especially important in pediatric nutrition. * **Egg:** Often referred to as the "Reference Protein" (Biological Value = 94), it is the gold standard for body-building foods due to its high bioavailability. * **Groundnut:** A potent plant-based protein source (approx. 25% protein). Legumes and nuts are the primary body-building foods for vegetarian populations. **High-Yield NEET-PG Pearls:** * **Reference Protein:** Egg is used as the standard for comparing the quality of other proteins. * **Limiting Amino Acids:** Pulses are deficient in **Methionine**, while Cereals are deficient in **Lysine**. This is why a cereal-pulse combination (e.g., Dal-Chawal) provides a complete amino acid profile. * **Net Protein Utilization (NPU):** Egg has the highest NPU (~96-100) among natural foods.

Question 250: What is the Recommended Dietary Allowance (RDA) of calcium for a normal adult male?

A. 100 mg
B. 400 mg (Correct Answer)
C. 800 mg
D. 1200 mg

Explanation: **Explanation:** The Recommended Dietary Allowance (RDA) for calcium is determined by the **ICMR-NIN (Indian Council of Medical Research - National Institute of Nutrition)** guidelines. For a normal adult male (and non-pregnant, non-lactating adult female), the RDA for calcium is **1000 mg/day** according to the latest 2020 guidelines. However, in the context of older exam patterns and traditional textbooks often cited in NEET-PG, the value of **400 mg/day** (based on older 2010 recommendations) is frequently used as the standard answer. **Analysis of Options:** * **A (100 mg):** This is significantly below the physiological requirement for bone mineralization and neuromuscular function in any age group. * **B (400 mg):** **Correct.** This matches the long-standing ICMR recommendation for Indian adults. It is the minimum intake required to maintain calcium balance in a healthy adult. * **C (800 mg):** This value is closer to the requirements for adolescents (13-15 years) or the updated 2020 standards for certain groups, but it was not the historical standard for adult males. * **D (1200 mg):** This high dose is typically reserved for physiological states with increased demand, such as **pregnancy, lactation**, and post-menopausal women to prevent osteoporosis. **High-Yield Clinical Pearls for NEET-PG:** * **Pregnancy/Lactation:** The RDA increases significantly to **1200 mg/day** (2020 guidelines) to support fetal skeletal development and milk production. * **Absorption:** Calcium absorption is enhanced by **Vitamin D** and lactose, while it is inhibited by phytates, oxalates, and high fiber intake. * **Best Source:** Milk and milk products are the best sources; among plant sources, **Ragi** (Finger millet) has the highest calcium content. * **Exam Tip:** Always check if the question specifies "ICMR 2020" guidelines. If it does, the answer for an adult male would be **1000 mg**. If not specified, 400-600 mg remains the classic "textbook" answer for older MCQ banks.

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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