Anatomy Active form of Vitamin D is: March 2011, March 2013 (a, e, g) A Cholecalciferol B 24, 25 hydroxy Vitamin D C 1, 25 hydroxy Vitamin D (Calcitriol) D 25, hydroxyl Vitamin D 💡 Explanation Active form of Vitamin D is: March 2011, March 2013 (a, e, g) ✓ Correct Answer: C. 1, 25 hydroxy Vitamin D (Calcitriol)