Answer: (A)
Statement 1 – Correct: Under the Noise Pollution (Regulation and Control) Rules, 2000, permissible noise limits are prescribed separately for different zones—industrial, commercial, residential and silence zones—and vary between daytime and nighttime.
Statement 2 – Incorrect: The daytime noise limit for residential areas is lower than that for commercial areas. The prescribed limit is 55 dB(A) Leq for residential areas and 65 dB(A) Leq for commercial areas.
Statement 3 – Correct: The nighttime noise limit for silence zones is lower than that for residential areas. It is 40 dB(A) Leq for silence zones compared with 45 dB(A) Leq for residential areas.
Statement 4 – Correct: The Central Pollution Control Board (CPCB) is responsible for monitoring and assessing ambient noise levels in India through its noise-monitoring network and implementation-related activities.
Therefore, option A is the correct answer.
