<prompt> Wof vitamin D preparations would be the most appropriate in a patient with poor renal functionCholecalciferolCalcitriolErgocalciferolCalcifediol  <response>: 1-Hydroxylase activity must be adequate to produce 1,25OH 2 D 3. Calcitriol is the only choice that is already 1-hydroxylated. Ref:- kd tripathi; pg num:-341 