Which of the Following is NOT a Function of Derivatives

Question

Which of the following is NOT a function of derivatives of water-soluble vitamins?
A)coenzymes in metabolism of carbohydrates,lipids,and proteins
B)forming hydrogen carriers NAD and FAD
C)cofactors for enzymes
D)intestinal absorption of calcium and phosphate

Accepted Answer

Derivatives of water-soluble vitamins do not play a role in the intestinal absorption of calcium and phosphate. Rather, this is primarily regulated by vitamin D. The other options listed are all known functions of derivatives of water-soluble vitamins.