Role of liver in vitamin D metabolism: (A) Catalyzes rate limiting steb, (B) 1-hydroxylation, (C) 25-hydroxylation, (D) 24-hydroxylation
Answer is C. Found in the liver, this enzyme is a microsomal vitamin D hydroxylase that conves vitamin D into 25-hydroxyvitamin D (calcidiol), which is the major circulatory form of the vitamin.