SSC Delhi Police Constable Driver 2025 Mock Test General Knowledge Indian Geography Indian Economic and Human Geography

କେଉଁ ବର୍ଷରେ ଶବ୍ଦ ପ୍ରଦୂଷଣ (ନିୟନ୍ତ୍ରଣ ଏବଂ ନିୟନ୍ତ୍ରଣ) ନିୟମ ପ୍ରଣୟନ କରାଯାଇଥିଲା?

1
1986
2
1981
3
2010
4
2000
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