ध्वनि प्रदूषण मापने की इका – McqOptions

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1.	ध्वनि प्रदूषण मापने की इकाई है
A.	जौल
B.	डेसिबल
C.	न्यूटन
D.	नैनो इकाई
Answer» C. न्यूटन

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