Nutritional deficiencies and prevention MCQs With Answer
This concise, targeted introduction reviews nutritional deficiencies—micronutrient and macronutrient imbalances—and preventive strategies relevant to B. Pharm students. It emphasizes key concepts: vitamins (A, D, B12, folate, C), minerals (iron, iodine, zinc, calcium), clinical signs, biochemical markers, public health measures, dietary supplementation, fortification, drug–nutrient interactions, and therapeutic replacement. Understanding pathophysiology, diagnosis (MCV, ferritin, serum 25‑OH vitamin D, methylmalonic acid), and evidence‑based prevention (RDA, prophylactic dosing, screening) is essential for pharmacists advising patients and designing regimens. This set deepens clinical reasoning and pharmacy practice readiness. ‘Now let’s test your knowledge with 30 MCQs on this topic.’
Q1. Which laboratory marker is most sensitive for early iron deficiency before anemia develops?
- Serum hemoglobin
- Serum ferritin
- Mean corpuscular volume (MCV)
- Serum iron
Correct Answer: Serum ferritin
Q2. A B. Pharm student should recognize which neurological sign as most characteristic of vitamin B12 deficiency?
- Peripheral neuropathy with paresthesia and dorsal column dysfunction
- Hyperreflexia with choreiform movements
- Isolated optic neuritis without sensory loss
- Muscle cramps due to hypokalemia
Correct Answer: Peripheral neuropathy with paresthesia and dorsal column dysfunction
Q3. Which prevention strategy is most effective at population level for reducing iodine deficiency disorders?
- Individual tablet supplementation
- Universal salt iodization (fortification)
- Encouraging seaweed consumption only
- Periodic mass screening without intervention
Correct Answer: Universal salt iodization (fortification)
Q4. In assessing vitamin D status, which laboratory test is preferred?
- Serum 1,25‑dihydroxyvitamin D
- Serum 25‑hydroxyvitamin D (25‑OH D)
- Serum parathyroid hormone (PTH) only
- Urinary calcium excretion
Correct Answer: Serum 25‑hydroxyvitamin D (25‑OH D)
Q5. Which clinical feature is most specific to scurvy (vitamin C deficiency)?
- Night blindness
- Bleeding gums and perifollicular hemorrhages
- Rickets‑like bone deformities
- Peripheral edema due to hypoalbuminemia
Correct Answer: Bleeding gums and perifollicular hemorrhages
Q6. For a pregnant woman, the recommended daily folic acid dose to prevent neural tube defects is closest to which value?
- 50 µg
- 400 µg
- 5 mg
- 1 g
Correct Answer: 400 µg
Q7. Which drug is well known to cause pyridoxine (vitamin B6) deficiency and requires supplementation in some patients?
- Isoniazid
- Metformin
- Proton pump inhibitors
- Statins
Correct Answer: Isoniazid
Q8. In iron deficiency anemia, the typical peripheral blood smear shows which pattern?
- Microcytic, hypochromic red cells
- Macrocytic red cells with hypersegmented neutrophils
- Normocytic normochromic red cells only
- Spherocytes predominant
Correct Answer: Microcytic, hypochromic red cells
Q9. Which intervention best prevents vitamin A deficiency and its ocular complications in high‑risk pediatric populations?
- Periodic high‑dose vitamin A supplementation (e.g., 200,000 IU) per WHO guidelines
- Daily low‑dose vitamin E supplementation
- Iron fortification of milk only
- Encouraging citrus fruit intake exclusively
Correct Answer: Periodic high‑dose vitamin A supplementation (e.g., 200,000 IU) per WHO guidelines
Q10. Which biochemical test helps distinguish vitamin B12 deficiency from folate deficiency?
- Serum ferritin
- Serum methylmalonic acid (MMA)
- Serum albumin
- Urinary sodium
Correct Answer: Serum methylmalonic acid (MMA)
Q11. Which nutrient deficiency is most commonly associated with growth retardation, hypogonadism, and impaired immunity in children?
- Zinc
- Vitamin D
- Vitamin K
- Selenium
Correct Answer: Zinc
Q12. A common clinical sign of vitamin K deficiency is:
- Prolonged prothrombin time and bleeding tendency
- Night blindness
- Peripheral neuropathy
- Hypercalcemia
Correct Answer: Prolonged prothrombin time and bleeding tendency
Q13. Which public health approach reduces both anemia and iron deficiency in a population effectively?
- Single high‑dose iron injection in adults only
- Food fortification with iron and targeted supplementation for vulnerable groups
- Universal vitamin B12 supplementation
- Massive caloric supplementation without micronutrients
Correct Answer: Food fortification with iron and targeted supplementation for vulnerable groups
Q14. Which medication commonly interferes with vitamin B12 absorption by reducing gastric acidity?
- Proton pump inhibitors
- Beta blockers
- Statins
- ACE inhibitors
Correct Answer: Proton pump inhibitors
Q15. In prevention of rickets in infants, the recommended prophylactic daily vitamin D dose (where deficiency risk exists) is approximately:
- 400 IU
- 10,000 IU
- 50 IU
- 5,000 IU
Correct Answer: 400 IU
Q16. Which lab finding is most consistent with folate deficiency?
- Low MCV and high ferritin
- Elevated MCV with normal methylmalonic acid
- Low MCV with high methylmalonic acid
- Elevated serum ferritin and transferrin saturation
Correct Answer: Elevated MCV with normal methylmalonic acid
Q17. Which micronutrient deficiency increases maternal risk of postpartum hemorrhage due to poor uterine contractility?
- Magnesium
- Iron
- Vitamin A
- Calcium
Correct Answer: Calcium
Q18. Which strategy is least likely to prevent fat‑soluble vitamin deficiencies in patients on long‑term orlistat therapy?
- Fat‑soluble vitamin supplementation (A, D, E, K)
- Dietary fat restriction beyond orlistat effect
- Monitoring vitamin levels periodically
- Adjusting supplementation based on laboratory results
Correct Answer: Dietary fat restriction beyond orlistat effect
Q19. Which of the following best explains the pathogenesis of anemia of chronic disease relative to iron deficiency?
- Increased hepcidin leading to iron sequestration and low serum iron
- Absolute depletion of iron stores with very low ferritin
- Autoimmune hemolysis causing rapid RBC destruction
- Folate deficiency causing ineffective erythropoiesis
Correct Answer: Increased hepcidin leading to iron sequestration and low serum iron
Q20. Vitamin B1 (thiamine) deficiency classically presents with which clinical syndrome?
- Beriberi (peripheral neuropathy and cardiac failure) and Wernicke encephalopathy
- Scurvy with bleeding gums
- Rickets with bowed legs
- Goiter and cretinism
Correct Answer: Beriberi (peripheral neuropathy and cardiac failure) and Wernicke encephalopathy
Q21. Which counseling point is most important when recommending iron tablets to reduce gastrointestinal side effects and maximize absorption?
- Take with milk to improve absorption
- Take with vitamin C–rich juice and between meals if tolerated
- Take with antacids to prevent GI upset
- Crush and mix with tea to mask taste
Correct Answer: Take with vitamin C–rich juice and between meals if tolerated
Q22. In chronic alcoholics, which vitamin deficiency is most implicated in the development of Wernicke‑Korsakoff syndrome?
- Vitamin B6 (pyridoxine)
- Vitamin B1 (thiamine)
- Vitamin B12 (cobalamin)
- Vitamin C
Correct Answer: Vitamin B1 (thiamine)
Q23. Which mineral deficiency is a major global cause of preventable cognitive impairment when occurring during fetal and early childhood development?
- Iodine
- Calcium
- Magnesium
- Fluoride
Correct Answer: Iodine
Q24. Which indicator is most useful to monitor vitamin A status and population‑level deficiency in young children?
- Serum retinol concentration
- Serum 25‑OH vitamin D
- Serum ferritin
- Serum albumin
Correct Answer: Serum retinol concentration
Q25. Which dietary strategy is recommended to prevent multiple micronutrient deficiencies in low‑income settings?
- Exclusive reliance on supplementation only during adulthood
- Dietary diversification, targeted supplementation, and food fortification
- Avoiding fortified foods to encourage natural diets
- High‑protein diets only without focus on micronutrients
Correct Answer: Dietary diversification, targeted supplementation, and food fortification
Q26. Which laboratory value would you expect in early vitamin B12 deficiency even before anemia is apparent?
- Elevated methylmalonic acid and homocysteine
- Low serum ferritin
- Low serum calcium
- Decreased serum 25‑OH vitamin D
Correct Answer: Elevated methylmalonic acid and homocysteine
Q27. Which of the following is a recognized adverse effect of chronic excessive vitamin A intake?
- Hypercalcemia and nephrolithiasis
- Teratogenicity and liver toxicity
- Iron overload
- Hypothyroidism
Correct Answer: Teratogenicity and liver toxicity
Q28. Which population group is at highest risk of vitamin D deficiency due to reduced cutaneous synthesis?
- Outdoor workers in equatorial regions
- Elderly individuals with limited sun exposure
- Young adults on high‑sun diets
- Infants fed formula fortified with vitamin D
Correct Answer: Elderly individuals with limited sun exposure
Q29. Which statement about folic acid fortification of staple foods is correct?
- It has no impact on neural tube defect prevalence
- It reduces neural tube defects and improves population folate status
- It causes widespread vitamin B12 deficiency
- It is ineffective because folate is heat labile and destroyed during processing
Correct Answer: It reduces neural tube defects and improves population folate status
Q30. When counseling a patient on preventing iron deficiency during pregnancy, which is the best evidence‑based recommendation?
- Avoid iron supplementation because dietary intake is sufficient
- Routine oral iron supplementation per antenatal guidelines and screening with hemoglobin/ferritin
- Only supplement if pica develops
- Use injectable iron for all pregnant women regardless of status
Correct Answer: Routine oral iron supplementation per antenatal guidelines and screening with hemoglobin/ferritin
