This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematology, Subject name: Pharmacology
Warfarin acts by inhibiting the activation of all the following factors except:- 
Select and explain. 
A. Factor III, B. Factor VII, C. Factor IX, D. Factor X
A: Factor III
Answer: A: Factor III 
Explanation: Warfarin acts by inhibiting the activation of vitamin K dependent clotting factors- directly inhibiting Vit K epoxide reductase These factors include clotting factors II, VII, IX and X.