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: Social & Preventive Medicine
[{'content': 'Antiretroviral prophylaxis decrease the chance of transmission of HIV to fetus during pregnancy of HIV to fetus during pregnancy by \nSelect and explain. \nA. 35%, B. 45%, C. 50%, D. 65%', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]