SSC SSC CHSL (Tier I & Tier II) Mock Test Series 2025 (New) General Science Chemistry Chemistry in Everyday Life

बायोगैस और CNG का मुख्य घटक क्या है?

1
प्रोपेन
2
हाइड्रोजन सल्फ़ाइड
3
मीथेन
4
एथेन 
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