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': 'Clopidogrel mechanism of action - \nSelect and explain. \nA. Thromboxane A2 inhibition, B. Inhibit ADP mediated cAMP activation, C. GP IIb/Ina inhibitors, D. None', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Inhibit ADP mediated cAMP activation", 'role': 'assistant'}]