The State Governments have categorized the areas into how many types or zones for the purpose of implementation of noise standards?
The State Governments have categorized the areas into how many types or zones for the purpose of implementation of noise standards?

Q. The State Governments have categorized the areas into how many types or zones for the purpose of implementation of noise standards?

A.            4

B.            3

C.            6

D.            5

Answer: 4
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