Which vitamin is produced in human skin when exposed to sunlight?
- A. Vitamin A
- B. Vitamin C
- C. Vitamin D ✓
- D. Vitamin K
Correct answer
C. Vitamin D
Explanation
UVB radiation from sunlight converts 7-dehydrocholesterol in the skin to previtamin D3, which becomes vitamin D3. Vitamin D is essential for calcium absorption and bone health.