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
Maximum tolerable sound level to human cass 
Select and explain. 
A. 100 dB, B. 85 dB, C. 120 dB, D. 40 dB
B: 85 dB
Answer: B: 85 dB 
Explanation: None