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': 'Low doses of aspirin used in myocardial infarction act by - \nSelect and explain. \nA. Inhibiting thromboxane synthetase, B. Inhibit cyclooxygenase, C. Releasing EDRF, D. High protein binding activity', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Inhibit cyclooxygenase Aspirin (in low doses) ---> inhibits synthesis of TXA2 by inhibiting the enzyme cycloxygenase So that immediate precursor (prostaglandins) of TXA2 are not synthesized. o Ticlopidine, clopidogrel -4 they block ADP mediated cAMP inactivation.", 'role': 'assistant'}]