Biological Oxygen Demand (BOD) is a measure of

Industrial wastes poured into water bodies

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Extent to which water is polluted with organic compound

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Amount of carbon monoxide inseparably combined with haemoglobin

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Amount of oxygen needed by green plants during night

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Solution

The correct option is B Extent to which water is polluted with organic compound
Biochemical oxygen demand (BOD) is the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to break down organic material present in a given water sample at certain temperature over a specific time period. Itisusedasameasureofthedegreeofwaterpollution.
Therefore, the correct answer is option B.

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