During sewage treatment, biogases are produced which include :

During sewage treatment, biogases are produced which include :

Options

(a) methane, oxygen, hydrogen sulphide
(b) hydrogen sulphide, methane, sulphur dioxide
(c) hydrogen sulphide, nitrogen, methane
(d) methane, hydrogen sulphide, carbon dioxide

Correct Answer:

methane, hydrogen sulphide, carbon dioxide

Explanation:

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