Question: Which one of the following statements is NOT correct ?
Eutrophication indicates that water body is polluted ?
The dissolved oxygen concentration below $6 \mathrm{ppm}$ inhibits fish growth
Eutrophication leads to increase in the oxygen level in water
Eutrophication leads to anaerobic conditions
Correct Option: , 3
Solution:
Eutrophication leads to decrease in oxygen level of water.
$3^{\text {rd }}$ statement is incorrect
