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When domestic sewage mixes with river wa...

When domestic sewage mixes with river water

A

Small animals like rats will die after drinking river water

B

The increased microbial activity releases micro-nutrients such as iron

C

The increased microbial activity uses up dissolved oxygen

D

The river water is still suitable for drinking as impurities are only about `0.1%`

Text Solution

Verified by Experts

The correct Answer is:
C
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