engineering recuitment BPSC Assistant Sanitary & Waste Management Officer Mock Test 2022 General Knowledge Ecology and Environment Conservation efforts: India and World
ପୃଥିବୀ ସମ୍ମିଳନୀ 1992 ର ଏଜେଣ୍ଡା 21 ରେ, 21 କ’ଣ ଦର୍ଶାଏ?
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21 ମାସ
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ଏକବିଂଶ ଶତାବ୍ଦୀ
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21 ସରକାରୀ ଆଲୋଚନା
4
21 ଦେଶ