Deficiency of which vitamin causes rickets?
Answer and explanation
Correct answer: D. Vitamin D
- Step 1: Rickets is a metabolic bone disorder in children characterized by defective mineralization of growth plates and epiphyseal cartilage, causing soft, bowed bones.
- Step 2: Vitamin D (cholecalciferol) is converted in the liver and kidneys to calcitriol (), which is required for intestinal absorption of calcium and phosphate; its deficiency causes rickets.
Answer
Vitamin D.
Why not the others: 'Vitamin C' deficiency leads to scurvy due to impaired collagen cross-linking; 'Vitamin B₁' (thiamine) deficiency causes beriberi and Wernicke-Korsakoff syndrome; 'Vitamin A' deficiency leads to nyctalopia (night blindness) and xerophthalmia.
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