railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) General Knowledge Ecology and Environment

ઓઝોન સ્તર કયા સ્તરમાં આવેલું છે?

1
બહિર્મંડળ
2
ઉષ્માવરણ
3
સ્તરમંડળ
4
મધ્યાવરણ
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