railway RPF Constable Mock Test Series 2024 General Knowledge Ecology and Environment Environmental pollution

ନିମ୍ନଲିଖିତ ମଧ୍ୟରୁ କେଉଁଟି ଏକ କ୍ଷୟ ପ୍ରଦୂଷଣକାରୀ ଅଟେ ?

1
ପାରଦ 
2
ଜଡ଼ ଧାତୁ 
3
ଷ୍ଟିଲ 
4
ଘରୋଇ ଜଳ ନିଷ୍କାସନ
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