<prompt> Most potent form of vitamin D is -Ergocalciferol Vit. D27 dehydro cholecalciferol25 hydroxy cholecalciferol1,25 dihydroxy cholecalciferol  <response>: Ans. is d i.e., 1,25 dihydroxy cholecalciferol o 1,25 cholecalciferol also ka calcitriol is active form of Vit. D.o Cholecalciferol in liver continued to 25 hydroxy cholecalciferol.o in kidney 25-Hydroxvcholecalciferol converted into 1,25-Hydroxy cholecalciferol. 