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: Medicine
[{'content': 'The drug of choice for the treatment of Pneumocystis jiroveci (Pneumocystis carinii) pneumonia is \nSelect and explain. \nA. Lamivudine, B. Cotrimoxazole (TMP-SMX), C. Doxycycline, D. Itraconazole', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]