Cattle dung used as a substrate in biogas production is a rich source of . . . . . . .

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

Which is the main gas produced in biogas?

Statement $P$: Bacteria produce methane gas due to metabolic processes like anaerobic respiration.
Statement $Q$: Bacteria act on starchy materials.

Which organization developed the biogas technology in India?

Mohan was writing a report on the benefits of biogas:
$i$. It is cheap and safe
$ii$. Can be used for cooking
$iii$. Can be transported easily
$iv$. Causes pollution
Which one of the above statements has been reported incorrectly?