A) water is pure
B) water is highly polluted
C) water is less polluted
D) consumption of organic matter in the water is higher by the microbes
Correct Answer: B
Solution :
BOD is the measure or oxygen required for chemical breakdown of organic pollutants or wastes. High value of BOD in a water source indicates, high level of pollutants. Highly polluted water bodies has increased demand of BOD.
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