This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
During normal conversation sound heard at 1meter distance is 
Select and explain. 
A. 60 dB, B. 80 dB, C. 90 dB, D. 120 dB
A: 60 dB
Answer: A: 60 dB 
Explanation: At a distance of 1 m , intensity of Whisper - 30 dB Normal conversation - 60 dB Shout - 90 dB Discomfo of the ear - 120 dB Pain in the ear - 130 dB Ref: Dhingra 7e pg 21.