AIPMT 2013 Biology Solved Paper

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Question : 81 of 90

Marks: +1, -0

During sewage treatment, biogases are produced which include :

hydrogensulphide, nitrogen, methane
methane, hydrogensulphide, carbon dioxide
methane, oxygen, hydrogensulphide
hydrogensulphide, methane, sulphur dioxide

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