Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Environmental Science

According to National Ambient Air Quality Standards (NAAQS) annual average concentration (μg/m3) for SO2 and NO2 in ecologically sensitive areas are

1
20 and 60 respectively
2
80 and 47 respectively
3
50 and 20 respectively
4
20 and 30 respectively
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