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': 'Platelet aggregation is inhibited by all except ? \nSelect and explain. \nA. Aspirin, B. Clopidogrel, C. Thromboxane A2, D. Eptifibatide', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Thromboxane A2", 'role': 'assistant'}]