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(A) $BOD$ stands for Biochemical Oxygen Demand. It refers to the amount of dissolved oxygen that would be consumed if all the organic matter in one li

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The water is highly polluted.

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(A) $BOD$ stands for Biochemical Oxygen Demand. It refers to the amount of dissolved oxygen that would be consumed if all the organic matter in one liter of water were oxidized by bacteria.Greater $BOD$ indicates that there is a higher amount of biodegradable organic matter present in the water,which requires more oxygen for decomposition.Therefore,a higher $BOD$ value is a direct indicator of high water pollution levels.

Higher $BOD$ indicates that...

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