This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
Vitamin K is necessary for the formation of the following factors by the liver except 
Select and explain. 
A. Factor II, B. Factor VII, C. Factor IX, D. Factor V
D: Factor V
Answer: D: Factor V 
Explanation: Vitamin K is an essential factor to a liver carboxylase that adds a carboxyl group to glutamic acid residues on five of the impoant clotting factors: prothrombin, Factor VII, Factor IX, Factor X, and protein C. Ref: Guyton and Hall textbook of medical physiology 13th edition. Page:490