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': 'Maximum tolerable sound level to human cass \nSelect and explain. \nA. 100 dB, B. 85 dB, C. 120 dB, D. 40 dB', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]