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Q.

If BOD of river is high, it means that the river is

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a

not polluted

b

very much polluted with inorganic chemicals

c

very much polluted with organic chemicals which are decomposed by micro-organisms

d

polluted with pesticides

answer is C.

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Detailed Solution

The water body with high BOD is said to be more polluted with organic chemicals that are decomposed by microorganisms.
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