Gobar gas contains mainly

In $STPs$,in which tank is biogas produced during the process?

In biogas production,the decomposition of dung to produce gas is carried out by which of the following?

$A$ : Methanogens can show symbiotic association with eukaryotic organisms.
$R$ : They are used for the production of biogas.

Besides methane,which gas is produced in biogas?

Study the following flow chart of biogas production and select the correct option for $A, B$ and $C$.
Stage $III$: $C$
Stage $II$: Organic acids $\xrightarrow{B}$ $C$
Stage $I$: Soluble compounds or monomers $\xrightarrow{A}$ Organic acids
(Note: The flow chart shows: Proteins,Fats,Cellulose,Hemicellulose $\rightarrow$ Soluble compounds or monomers $\xrightarrow{A}$ Organic acids $\xrightarrow{B}$ $C$)