<prompt> Active from of vitamin D is:Cholecalciferol24, 25 OH 2 Vit-D1, 25 OH 2 Vit-D25-OH Vit-D  <response>: Ans. c 1, 25 OH 2 Vit-DRef: Ganong, 25th edp.377The active form of vitamin D is called 1, 25- dihydroxycholecalciferol or calcitriol 