This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Physiology of Hearing, Subject name: ENT
[{'content': 'Sound intensity of whispering is: \nSelect and explain. \nA. 30 dB, B. 90 dB, C. 2 dB, D. 120 dB', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The intensity of sound at 1 metre, in various human conversations are as below: Whisper - 30 dB Normal conversation - 60 dB Shout - 90 dB There occurs Discomfo in the ear at 120 dB and pain in the ear at a loudness of 130 dB', 'role': 'assistant'}]