A) \[{{H}_{2}}S\]
B) \[C{{H}_{4}}\]
C) \[{{C}_{2}}{{H}_{6}}\]
D) \[{{C}_{3}}{{H}_{8}}\]
Correct Answer: B
Solution :
Biogas is a mixture of gases (containing predominantly methane) produced by the microbial activity and which may be used as fuel.
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