A) A is correct and R is its explanation
B) A is correct and R is not its explanation
C) A is correct and R is wrong
D) A is wrong and R is correct
Correct Answer: A
Solution :[a] Prolonged exposure to noise level above 80 dB (decibel) gradually leads to permanent loss of hearing ability. Therefore sound above 80 dB level is considered to be a hazardous noise pollution.
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