The wastewater form a city, containing a high concentration

General Aptitude
Civil Engineering

M: +1.00/-0.33

The wastewater form a city, containing a high concentration of biodegradable organics, is beingsteadily discharged into a flowing river at a location S. If the rate of aeration of the river water islower than the rate of degradation of the organics, then the dissolved oxygen of the river water

[GATE CE 2017 Set 1]

A is lowest at the locations S

B is lowest at a point upstream of the location S

C remains constant all along the length of the river

D is lowest at a point downstream of the location S