How are biological oxygen demand and dissolved oxygen related?

Inversely

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Directly Proportional

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Not dependent on each other

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None of these

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Solution

The correct option is A
Inversely

Biological Oxygen Demand (BOD) is a measure of the oxygen used by microorganisms to decompose this waste.

When BOD levels are high, dissolved oxygen (DO) levels decreases, because the oxygen that is available in the water is being consumed by the bacteria.

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