Which clinical condition results from Vitamin D deficiency in growing children, characterized by soft, deformed bones (bow legs)?
Answer and explanation
Correct answer: C. Rickets
- Step 1: Active Vitamin D3 (calcitriol) stimulates intestinal calcium and phosphate absorption. Step 2. In growing children, deficiency impairs mineralization of epiphyseal growth plates, leading to skeletal deformities like rickets. Answer: Rickets. Why not the others: Osteomalacia is adult vitamin D deficiency (mineralization failure in mature bone); Scurvy is vitamin C deficiency; Pellagra is vitamin B3 deficiency.
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