Teaching UP PGT Mock Test Series 2024 General Knowledge Geography (World Geography) Climatology

वायु के संघटन में ऑक्सीजन का योगदान कितने प्रतिशत है?

1
20.09 प्रतिशत 
2
78.03 प्रतिशत 
3
0.033 प्रतिशत 
4
0.94 प्रतिशत 
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