This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
Exposure to noise above ----- cause permanent hearing loss 
Select and explain. 
A. 85 db, B. 90 db, C. 100 db, D. 160 db
C: 100 db
Answer: C: 100 db 
Explanation: Repeated or continuous exposure to noise around 100 decibels may result in a permanent hearing loss. In this, the inner ear damage may vary from minor changes in the hair cell endings to complete destruction of the organs of coi.Exposure to noise above 160dB may rupture the tympanic membrane and cause permanent hearing lossPark 23e pg: 742