1.

The permissible standards of air quality fixed in India for residential areas for SPM, SO2, NO, and CO in μg/m3 respectively are:

A. 200, 80, 80, 2000
B. 500, 120, 120, 5000
C. 100, 30, 30, 1000
D. 160, 80, 100, 10000
Answer» B. 500, 120, 120, 5000


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