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 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 night

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Solution

The correct option is B Extent to which water is polluted with organic compounds
Biochemical oxygen demand (BOD) is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period. BOD measures the extent to which water is polluted with organic compounds. Greater the BOD of waste water, more is its polluting
potential.

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