Which is the upper limit of sound advice of Central Pollution Control Board (CPCB) for residential areas?

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Question:Which is the upper limit of sound advice of Central Pollution Control Board (CPCB) for residential areas?

1.45 Decibels

2.50 Decibels

3.55 Decibels

4.60 Decibels

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  1. Which is the upper limit of sound advice of Central Pollution Control Board (CPCB) for residential areas?
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