Nutrition and Health — MCQs

Nutrition and Health Indian Medical PG Practice Questions and MCQs

Question 291: What is the approximate daily calorie requirement for a one-year-old child?

A. 800 kcal
B. 1000 kcal (Correct Answer)
C. 1200 kcal
D. 1500 kcal

Explanation: **Explanation:** The daily calorie requirement for children is primarily determined by their age, weight, and rapid growth phase. According to the **ICMR-NIN (2020) guidelines**, the energy requirement for an infant aged 6–12 months is approximately 80 kcal/kg/day. By the age of one year, the average weight of a healthy child is roughly 10 kg (tripling their birth weight). Therefore, the total daily requirement is approximately **1000 kcal/day**. **Analysis of Options:** * **Option B (1000 kcal):** This is the standard reference value for a one-year-old. A simple high-yield formula for pediatric energy needs is: **1000 kcal + (100 × age in years)**. For a 1-year-old: 1000 + (100 × 0) = 1000 kcal. * **Option A (800 kcal):** This is insufficient for a one-year-old child who has transitioned to complementary feeding and has increased physical activity (crawling/walking). * **Option C (1200 kcal):** This value is more appropriate for a child aged 2–3 years. * **Option D (1500 kcal):** This exceeds the requirement for a toddler and is closer to the needs of a school-aged child (approx. 7–9 years). **High-Yield NEET-PG Pearls:** 1. **Growth Rule:** Birth weight doubles by 5 months, triples by 1 year, and quadruples by 2 years. 2. **Energy Density:** For infants, the protein requirement is approximately **1.1 g/kg/day** (ICMR 2020). 3. **The "1000 kcal" Rule:** A 1-year-old needs 1000 kcal. For every subsequent year until puberty, add 100 kcal to this base. 4. **Reference Weight:** The ICMR 2020 reference weight for a 1-year-old is roughly 9.4 kg for boys and 8.9 kg for girls, making 1000 kcal the closest practical estimate.

Question 292: James Lind is related to the discovery of which of the following?

A. Prevention of scurvy (Correct Answer)
B. Pathogenesis of scurvy
C. Cause of scurvy
D. All of the above

Explanation: **Explanation:** **James Lind** (1716–1794), a Scottish naval surgeon, is famously credited with conducting one of the first ever **clinical trials** in medical history. **Why Option A is correct:** In 1747, while serving on the HMS Salisbury, Lind observed that sailors suffering from scurvy recovered rapidly when their diet was supplemented with **citrus fruits** (lemons and oranges). His work focused on the **prevention and treatment** of the disease through dietary intervention. This discovery eventually led the British Royal Navy to mandate lemon juice rations, effectively eliminating scurvy among sailors. **Why Options B and C are incorrect:** While Lind discovered the *cure*, he did **not** understand the underlying **pathogenesis** or the specific **cause** (Vitamin C deficiency). * **Pathogenesis:** The biological mechanism of how Vitamin C deficiency leads to defective collagen synthesis was not understood until the 20th century. * **Cause:** Lind incorrectly hypothesized that scurvy was caused by "putrefaction" of the body due to damp air and poor digestion. The actual molecule, **Ascorbic Acid (Vitamin C)**, was not isolated and identified as the cause until 1932 by Albert Szent-Györgyi. **High-Yield Clinical Pearls for NEET-PG:** * **James Lind:** Known as the "Father of Naval Hygiene" and a pioneer of the controlled clinical trial. * **Scurvy:** Characterized by the "4 Hs": **H**emorrhage (petechiae, corkscrew hairs), **H**yperkeratosis, **H**ypochondriasis, and **H**ematologic abnormalities (anemia). * **Infantile Scurvy:** Also known as **Barlow’s Disease**. * **First Sign:** The earliest clinical sign of scurvy is often **follicular hyperkeratosis**, followed by swollen, bleeding gums (scurvy buds).

Question 293: How many doses of vitamin A are required to treat deficiency?

A. 1
B. 2
C. 3 (Correct Answer)
D. 4

Explanation: **Explanation** The treatment of clinical Vitamin A deficiency (Xerophthalmia) follows a specific therapeutic schedule designed to rapidly restore hepatic stores and prevent permanent ocular damage. **Why Option C is Correct:** According to the WHO and National guidelines, the treatment of Vitamin A deficiency requires **3 doses** administered at specific intervals to ensure both immediate recovery and long-term replenishment: * **Dose 1:** Administered immediately upon diagnosis (Day 0). * **Dose 2:** Administered the following day (Day 1). * **Dose 3:** Administered four weeks later (Day 28). The first two doses act to saturate the tissues and initiate the healing of corneal lesions, while the third dose replenishes the liver's functional reserves to prevent recurrence. **Why Other Options are Incorrect:** * **Option A & B:** A single or double dose is insufficient for treating established clinical deficiency. While a single dose is used for *prophylaxis* (prevention), it does not provide the sustained levels needed for *therapeutic* recovery. * **Option D:** Four doses are not part of the standard acute treatment protocol. Excessive administration increases the risk of hypervitaminosis A (toxicity). **NEET-PG High-Yield Pearls:** * **Dosage:** For children >1 year, each dose is **2 lakh IU** (1 lakh IU for infants 6–12 months). * **Prophylaxis Schedule:** Under the National Vitamin A Prophylaxis Program, a total of **9 doses** are given until 5 years of age (1st dose at 9 months with Measles vaccine, then every 6 months). * **Earliest Sign:** Conjunctival Xerosis (objective); Night Blindness (subjective). * **Bitot’s Spots:** These represent squamous metaplasia and are the most characteristic sign of deficiency.

Question 294: "Maldon Teeth" is due to -

A. Lead
B. Fluoride (Correct Answer)
C. Calcium
D. Phosphorus

Explanation: **Explanation:** **Maldon Teeth** is a historical and clinical synonym for **Dental Fluorosis**. The term originated from the town of Maldon in Essex, England, where the local water supply naturally contained high levels of fluoride (approx. 5 mg/L), leading to widespread dental mottling among the inhabitants. **1. Why Fluoride is correct:** Dental fluorosis occurs due to the excessive ingestion of fluoride (typically >1.5 mg/L in drinking water) during the period of tooth development (amelogenesis). Fluoride interferes with the metabolic activity of ameloblasts, leading to defective enamel matrix formation and hypomineralization. Clinically, this manifests as "Maldon Teeth," characterized by lusterless, paper-white patches, which may later turn brown or black (mottling) with horizontal striations. **2. Why other options are incorrect:** * **Lead:** Lead poisoning (Plumbism) causes a "Burtonian line"—a bluish-purple line on the margins of the gums—but does not cause the characteristic mottling of enamel. * **Calcium & Phosphorus:** These are essential minerals for bone and tooth mineralization. Their deficiency leads to hypoplasia or rickets/osteomalacia, but they are not associated with the specific "Maldon" mottling pattern. **High-Yield Clinical Pearls for NEET-PG:** * **Safe Limit:** The recommended fluoride level in drinking water is **0.5–0.8 mg/L**. * **Dental Fluorosis:** Occurs when levels exceed **1.5 mg/L**. It is considered an "index of community fluorosis." * **Skeletal Fluorosis:** Occurs with prolonged intake at levels **>3–6 mg/L**. * **Nalgonda Technique:** Used for defluoridation of water at the domestic/community level using alum, lime, and bleaching powder. * **Bell’s Index:** Used to grade the severity of dental fluorosis.

Question 295: What is the best indicator for monitoring the impact of the Iodine Deficiency Disorders Control programme?

A. Prevalence of goiter among school children (Correct Answer)
B. Urinary iodine levels among pregnant women
C. Neonatal hypothyroidism
D. Iodine level in soil

Explanation: **Explanation:** The National Iodine Deficiency Disorders Control Programme (NIDDCP) utilizes specific indicators to assess the severity of iodine deficiency and the effectiveness of interventions. **Why Option A is Correct:** The **Prevalence of Goiter among school children (6–12 years)** is considered the best indicator for **monitoring the long-term impact** of the programme. School children are a representative group of the community, easily accessible, and their thyroid gland is highly sensitive to iodine status. A total goiter rate (TGR) of <5% in this age group signifies that iodine deficiency is no longer a public health problem in that community. **Analysis of Incorrect Options:** * **B. Urinary iodine levels among pregnant women:** While urinary iodine excretion (UIE) is the best indicator for **current/recent iodine intake** (as 90% of iodine is excreted in urine), it reflects short-term status rather than the long-term impact on community health. * **C. Neonatal hypothyroidism:** This is the most sensitive indicator for **environmental iodine deficiency** and reflects the status of the most vulnerable group (newborns), but it is not the primary tool for routine community impact monitoring. * **D. Iodine level in soil:** This is an environmental marker of the risk of deficiency in a geographical area but does not measure the biological impact on the human population. **High-Yield NEET-PG Pearls:** * **Most Sensitive Indicator:** Neonatal TSH levels (Neonatal Hypothyroidism). * **Best Indicator for Recent Intake:** Median Urinary Iodine Excretion (UIE). * **Target for Salt Iodization:** At least 95% of households should consume salt with an iodine content of $\geq$ 15 ppm. * **Iodine Levels in Salt:** 30 ppm at the production level and 15 ppm at the consumer level.

Question 296: Fish is deficient in which of the following nutrients?

A. Iodine
B. Vitamin A
C. Iron (Correct Answer)
D. Phosphorus

Explanation: ### Explanation Fish is considered a high-quality protein source in community medicine and nutrition, but it has specific nutritional gaps. **Why Iron is the Correct Answer:** While fish is an excellent source of complete proteins, essential fatty acids, and various minerals, it is **notoriously poor in Iron**. Most varieties of fish contain negligible amounts of iron compared to red meats or organ meats (like liver). In the context of the NEET-PG syllabus, fish is traditionally categorized as being deficient in **Iron, Vitamin C, and Carbohydrates**. **Analysis of Incorrect Options:** * **A. Iodine:** Marine fish (sea fish) are the richest natural sources of iodine. Consuming fish is a primary dietary strategy for preventing Iodine Deficiency Disorders (IDD). * **B. Vitamin A:** Fish liver oils (like Cod liver oil) are the richest natural sources of Vitamin A and Vitamin D. Even the flesh of fatty fish contains significant amounts of fat-soluble vitamins. * **C. Phosphorus:** Fish is a very rich source of phosphorus and calcium, especially if small fish are eaten with their bones. **High-Yield Clinical Pearls for NEET-PG:** * **Biological Value (BV):** Fish has a high biological value (approx. 80), making it an excellent source of essential amino acids. * **PUFA Content:** Fish is rich in Omega-3 fatty acids (EPA and DHA), which are cardioprotective as they lower serum triglycerides and VLDL. * **Fluorine:** Sea fish are also a significant source of Fluorine, which helps in preventing dental caries. * **The "Rule of Three":** Remember that fish is generally deficient in **Iron, Vitamin C, and Calcium** (unless bones are consumed). However, among the given options, Iron is the most classically cited deficiency.

Question 297: Assessment of malnutrition is/are done by all except?

A. Hydroxyproline/creatinine ratio
B. Plasma/Amino acid ratio
C. Total lymphocyte count (Correct Answer)
D. Albumin concentration

Explanation: ### Explanation The assessment of malnutrition involves clinical, anthropometric, and biochemical parameters. While several biochemical markers reflect protein-energy status, the **Total Lymphocyte Count (TLC)** is primarily a marker of **immune function** rather than a direct diagnostic tool for malnutrition status in a community or clinical setting. **Why Total Lymphocyte Count (TLC) is the correct answer:** Although malnutrition can lead to lymphopenia (impaired cell-mediated immunity), TLC is highly non-specific. It is influenced by acute infections, stress, and medications (like steroids). In the context of standard nutritional assessment protocols, it is considered an indirect indicator of "nutritional risk" or "immunocompetence" rather than a direct measure of malnutrition itself. **Analysis of other options:** * **Hydroxyproline/Creatinine Ratio:** Hydroxyproline is an amino acid found in collagen. In malnourished children, collagen metabolism slows down, leading to low urinary hydroxyproline excretion. This ratio is a sensitive index for monitoring **growth velocity** and early malnutrition. * **Plasma Amino Acid Ratio:** In Kwashiorkor, the ratio of non-essential amino acids (Glycine, Serine, Glutamine) to essential amino acids (Leucine, Isoleucine, Valine, Methionine) increases. A ratio >3 is indicative of malnutrition. * **Albumin Concentration:** Serum albumin is a classic biochemical marker for **visceral protein stores**. Low levels (<3.5 g/dL) are characteristic of Kwashiorkor, though it is a late indicator due to its long half-life (approx. 20 days). **High-Yield Clinical Pearls for NEET-PG:** * **Best indicator for long-term malnutrition:** Stunting (Height-for-age). * **Best indicator for acute malnutrition:** Wasting (Weight-for-height). * **Pre-albumin:** A more sensitive marker than albumin for acute changes in nutritional status due to its short half-life (2 days). * **QUAC Stick:** Used for rapid assessment of malnutrition in emergencies (measures Mid-Upper Arm Circumference for Height).

Question 298: The daily requirement of fat is _______% of total energy?

A. 10
B. 15
C. 20 (Correct Answer)
D. 25

Explanation: **Explanation:** The correct answer is **20%**. According to the nutritional guidelines established by the ICMR (Indian Council of Medical Research) and WHO, fats should contribute to a significant but balanced portion of the total daily caloric intake. **1. Why 20% is correct:** For an average healthy adult, the recommended dietary allowance (RDA) for fat is approximately **20-30%** of the total energy intake. In the context of NEET-PG and standard textbooks like Park’s Preventive and Social Medicine, **20%** is often cited as the lower threshold for the general population to ensure the absorption of fat-soluble vitamins (A, D, E, K) and to provide essential fatty acids (Linoleic and Linolenic acid). **2. Why other options are incorrect:** * **10% (Option A):** This is too low for the general population. While very low-fat diets exist for specific therapeutic purposes (e.g., severe hyperlipidemia), 10% does not meet the physiological requirements for satiety and essential fatty acid transport. * **15% (Option B):** While closer, it is still below the standard recommended range for a balanced diet in a healthy adult. * **25% (Option D):** While 25% falls within the acceptable range (20-30%), 20% is the traditionally taught "minimum" baseline for daily requirement questions in Indian medical exams unless a specific range is provided. **High-Yield Clinical Pearls for NEET-PG:** * **Energy Density:** Fat provides **9 kcal/g**, which is more than double that of carbohydrates and proteins (4 kcal/g). * **Essential Fatty Acids:** Must be provided in the diet; they should contribute at least **3%** of total energy intake. * **Saturated Fats:** Should be limited to less than **10%** of total energy to reduce cardiovascular risk. * **Invisible Fat:** Even a diet with no added oils contains about 10% "invisible fat" from cereals, pulses, and vegetables.

Question 299: The WHO considers all of the following dietary modifications to be appropriate in the prevention of Coronary Heart Disease (CHD), EXCEPT:

A. Decrease in complex carbohydrate consumption (Correct Answer)
B. Avoidance of alcohol consumption
C. Reduction of dietary cholesterol to below 100 mg per 1000 kcal per day
D. Reduction of fat intake to 20-30 percent of total energy intake

Explanation: **Explanation:** The WHO recommendations for the prevention of Coronary Heart Disease (CHD) focus on a balanced diet that reduces atherogenic factors while maintaining protective nutrients. **Why Option A is the correct answer (The "Except"):** The WHO actually recommends an **increase** in the consumption of **complex carbohydrates** (such as whole grains, legumes, vegetables, and fruits) rather than a decrease. Complex carbohydrates are rich in dietary fiber, which helps lower LDL cholesterol and improves glycemic control. Conversely, the intake of refined carbohydrates and free sugars should be restricted to less than 10% of total energy intake. **Analysis of Incorrect Options:** * **Option B (Avoidance of alcohol):** While moderate alcohol was once thought to be cardioprotective, current WHO guidelines emphasize that there is no "safe" limit for alcohol regarding cardiovascular health, and avoidance is recommended for primary prevention. * **Option C (Reduction of dietary cholesterol):** WHO guidelines recommend limiting dietary cholesterol to **below 100 mg per 1000 kcal per day** to prevent the progression of atherosclerosis. * **Option D (Reduction of fat intake):** Total fat intake should be limited to **20-30% of total energy**. Crucially, saturated fats should be <10%, and trans-fats should be <1% of total energy. **High-Yield Clinical Pearls for NEET-PG:** * **Salt Intake:** WHO recommends restricting salt intake to **less than 5 grams per day** to prevent hypertension and CHD. * **P/S Ratio:** The recommended Polyunsaturated to Saturated fat ratio is **0.5 to 1.0**. * **Dietary Fiber:** An intake of **at least 40g/day** is recommended for cardiovascular protection. * **Prudent Diet:** A diet characterized by low saturated fat, low cholesterol, and high complex carbohydrates is termed a "Prudent Diet."

Question 300: What is the recommended percentage of total energy supplied by protein from fish (PE % Kcal)?

A. 20%
B. 40%
C. 60%
D. 80% (Correct Answer)

Explanation: ### Explanation The **Protein-Energy Ratio (PE %)** is a vital indicator used in community medicine to assess the quality of a food source. It represents the percentage of total energy (calories) in a food item derived specifically from its protein content. **1. Why 80% is Correct:** Fish is considered one of the most concentrated sources of high-quality protein with very low carbohydrate content. While the exact percentage can vary slightly depending on the species (lean vs. fatty fish), for standard medical examinations like NEET-PG, the benchmark value for the PE % of fish is **80%**. This high ratio signifies that the majority of the caloric density in fish comes from proteins rather than fats or carbohydrates, making it an excellent source for muscle building and tissue repair. **2. Analysis of Incorrect Options:** * **A (20%):** This is too low for animal-based proteins. This range is more characteristic of pulses (e.g., Bengal gram) or certain cereals. * **B (40%):** This value is closer to the PE % of certain oilseeds or specific legumes, but still significantly underestimates the protein density of fish. * **C (60%):** While some fatty meats might fall into this range, it is still lower than the standard academic value assigned to fish. **3. High-Yield Clinical Pearls for NEET-PG:** * **Definition:** $PE \% = \frac{\text{Energy from Protein (kcal)}}{\text{Total Energy (kcal)}} \times 100$. * **Reference Values:** * **Fish:** 80% * **Meat:** 50% * **Milk:** 20% * **Pulses:** 12–15% * **Cereals:** 8–10% * **Biological Value (BV):** Fish has a high BV (approx. 80), comparable to meat, but slightly lower than eggs (100) and milk (95). * **Nutritional Benefit:** Fish is also a primary source of Omega-3 fatty acids (EPA and DHA), which are cardioprotective.

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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