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
The ‘acceptable’ noise level is 
Select and explain. 
A. 85 dB, B. 90 dB, C. 95 dB, D. 100 dB
A: 85 dB
Answer: A: 85 dB 
Explanation: None