- A Vitamin A
- B Vitamin B
- C Vitamin C
- D Vitamin D
Correct answer: D. Vitamin D
Explanation: Vitamin D deficiency causes rickets in children (soft, deformed bones) and osteomalacia in adults. Vitamin D is essential for calcium absorption from the gut. Sources: sunlight (skin synthesis), fish, egg yolk, fortified foods.
Concept context
Pathogens, infectious diseases, non-infectious diseases, drugs, cancer, and public health. High NEET importance.