What is the full form of the Khadi and Village Industries Commission?

What is filled into the concrete tank of a biogas plant?
$(i)$ Nutrients
$(ii)$ Cow dung
$(iii)$ Methanogens
$(iv)$ Organic waste

Assertion $A$: Herbivores release methane gas into the atmosphere.
Reason $R$: Herbivores consume a cellulose-rich diet.
Which option is correct for Assertion $A$ and Reason $R$?

How is biogas beneficial compared to conventional energy sources?

Which one of the following is the $CORRECT$ order of conversion of waste materials during biogas formation?

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 $\xrightarrow{B}$ $C$)