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': 'Level of which clotting factor falls first after giving warfarin? \nSelect and explain. \nA. V, B. VI, C. VII, D. VIII', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., VII", 'role': 'assistant'}]