Question

Deficiency of which of the following vitamins can cause impaired blood clotting?

• A. Vitamin B
• B. Vitamin C
• C. Vitamin D
• D. Vitamin K

Answer 1

The correct option is D Vitamin K

Vitamin K serves as an essential cofactor for a carboxylase that catalyzes carboxylation of glutamic acid residues on vitamin K-dependent proteins. The carboxylation of the proteins results in the formation of prothrombin. The coagulation proteins are activated by vitamin K and hence, the process of blood clotting is initiated by vitamin K. Deficiency of this vitamin may result in no blood clotting.

Thus, the correct answer is option D.