Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Environmental Science

Which of the following mixture of gases can be found in biogas?

1
CO, CH4, NO, H2S, H2O vapor
2
CO2, CH4, NH3, H2S, H2O vapor
3
CO2, CH4, N2O, NH3, H2O vapor
4
CO2, CH4, NO, NH3
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