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': 'Which of the following is antiplatelet drug ? \nSelect and explain. \nA. Clopidogrel, B. Tranexemic acid, C. Streptokinase, D. Hirudin', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Clopidogrel", 'role': 'assistant'}]