This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Warfarin mechanism of action ? \nSelect and explain. \nA. Chelating Ca, B. Inhibiting antithrombin III, C. Inhibiting Vitamin K dependent carboxylation, D. Inhibiting thrombin', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Inhibiting Vitamin K dependent carboxylation Warfarin inhibits vitamin K dependent carboxylation of clotting factors by inhibiting the enzyme Vitamin K epoxide reductase.", 'role': 'assistant'}]