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': 'Antiplatelet drug which inhibits cyclo-oxygenase 1 enzyme is? \nSelect and explain. \nA. Aspirin, B. Clopidogrel, C. Tirofiban, D. Dipyridamole', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Aspirin", 'role': 'assistant'}]