The natural process in which the oxygen of water of streams is consumed by sewage and at the same time, it is replenished by the atmosphere, is known

[Dnyan Deshmukh]

The natural process in which the oxygen of water of streams is consumed by sewage and at the same time, it is replenished by the atmosphere, is known as -

(a) Oxidation

(b) De Oxidation

(c) self purification

(d) sedimentation.

The correct Answer Is
(c) self purification