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': "Which drug is recommended for prevention of mother to child transmission of HIV infection?' \nSelect and explain. \nA. Didanosine, B. Nevirapine, C. Indinavir, D. Nelfmavir", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]