What gases are produced in anaerobic sludge digesters?

Options

AMethane and $C{O}_{2}$
BMethane, hydrogen sulphide and $C{O}_{2}$
CMethane, hydrogen sulphide and $CO.$
DHydrogen sulphide and $C{O}_{2}$

Correct answer

B. Methane, hydrogen sulphide and $C{O}_{2}$

Step-by-step solution

Biogas is a mixture of gases (containing predominantly methane) produced by microbial activity and which may be used as fuel. The major component of biogas is methane (50-70%) which is highly inflammable other gases are carbon dioxide (30-40%) and a mixture of other gases H₂, H₂S etc. (10%).

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