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: Microbiology
[{'content': 'Percutaneous transmission of HIV \nSelect and explain. \nA. 3%, B. <1%, C. 3-5%, D. >5%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]