In a biogas plant,the role of acidogenic bacteria is to

What is the depth of the concrete tank used in a biogas plant?

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 $\xrightarrow{B}$ $C$)

Which microorganisms are responsible for the production of gas in the biogas plant shown in the figure?

It is rich in methanogens.

The diagram below represents a typical biogas plant. Select the correct option for what $A$,$B$,and $C$ refer to.