Biochemistry Active form of Vitamin -D ? A 25-hydroxycholecalciferol B 24,25-dihydroxycholecalciferol C 1,25-dihydroxycholecalciferol D Cholecalciferol 💡 Explanation Active form of Vitamin -D ? ✓ Correct Answer: C. 1,25-dihydroxycholecalciferol