What are the main constituents of biogas? – McqOptions

MCQOPTIONS

1.	What are the main constituents of biogas?
A.	Methane and Sulphur dioxide
B.	Methane and Carbon dioxide
C.	Methane, Hydrogen and Nitric oxide
D.	Methane and Nitric oxide
Answer» C. Methane, Hydrogen and Nitric oxide

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