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Find the correct statement....

Find the correct statement.

A

The clean water organisms return in a river in which sewage has been discharged when the BOD is low.

B

Having an algal bloom in a lake indicates good quality of water.

C

According to CPCB, particulate size 25 micrometers or less in air cause the greatest harm to human health.

D

In DDT bio magnification the maximum ill effect is on the zooplanktons

Text Solution

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The correct Answer is:
A
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