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': 'Aspirin is used in prophylaxis of MI, because ? \nSelect and explain. \nA. It is an analgesic, B. Of antiplatelet action, C. Of sedative effect, D. Of prostaglandins inhibitory actions', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Antiplatelet action", 'role': 'assistant'}]