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 dependent coagulation factors include 
Select and explain. 
A. II and III, B. IX and X, C. III and V, D. VIII and XII
B: IX and X
Answer: B: IX and X 
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