人体内维生素D的生理活性形式是

A、25-(OH)D[img=~/QImg/2013-10-14-11-53-01/image005.jpg]
B、24,25-(OH)[img=~/QImg/2013-10-14-11-53-01/image001.jpg]D[img=~/QImg/2013-10-14-11-53-01/image005.jpg]
C、1,25-(OH)[img=~/QImg/2013-10-14-11-53-01/image001.jpg]D[img=~/QImg/2013-10-14-11-53-01/image005.jpg]
D、1,25-(OH)[img=~/QImg/2013-10-14-11-53-01/image001.jpg]D[img=~/QImg/2013-10-14-11-53-01/image001.jpg]
E、25-(OH)D[img=~/QImg/2013-10-14-11-53-01/image001.jpg]