railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) General Knowledge Polity Basics of Constitution

भारत में वायु (प्रदूषण निवारण एवं नियंत्रण) अधिनियम कब लागू किया गया?

1
1990
2
1975
3
2000
4
1981
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