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: ENT
[{'content': 'During normal conversation, sound heard at 1 meter distance is: \nSelect and explain. \nA. 80dB, B. 60dB, C. 90dB, D. 120dB', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Whisper 30 Db Normal conversation 60 Db Shout 90 Db Discomfo of the ear 120 Db Pain in the ear 130 dB', 'role': 'assistant'}]