Biological Oxygen Demand (BOD) is the measure of

Amount of Oxygen present in the Industrial wastes poured into water bodies

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The extent to which water is polluted with organic compounds

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Amount of carbon monoxide inseparably combined with haemoglobin

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Amount of oxygen needed by green plants during the night

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Solution

The correct option is B The extent to which water is polluted with organic compounds
Biological oxygen demand measurement is done in waste water treatment plant. It refers to the amount of oxygen required by aerobic organism to breakdown organic material present in water.

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