Question

The main cause for abundant coliform bacteria in the river Ganga is

Options

• disposal of unburnt corpses into water

• discharge of effluents from electroplating industries

• washing of clothes

• immersion of ashes

Answer 1

disposal of unburnt corpses into water

Explanation - 

Coliform is a group of bacteria present in human excreta. Thus, the disposal of unburnt corpses into water is the main source of this group of bacteria in the river Ganga.