The main constituents of biogas are – McqOptions

MCQOPTIONS

1.	The main constituents of biogas are
A.	Methane and Carbon di-oxide
B.	Methane and Nitric oxide
C.	Methane, Hydrogenand Nitric oxide
D.	Methane and Sulphur di-oxide
Answer» B. Methane and Nitric oxide

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