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. 80 dB, B. 60 dB, C. 90 dB, D. 120 dB', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Whisper\xa0- 30 dB\nNormal conversation - 60 dB\nShout - 90 dB\nDiscomfort of the ear - 120 dB\nPain in the ear - 130 dB', 'role': 'assistant'}]