Pick out the wrong statement?

Chemical Environmental Engineering 11/12/2020

A. Biological oxygen demand (BOD) is a characteristic and not a constituent of water
B. BOD is a measure of the amount of oxygen which will be demanded & used in 5 days by the
biological decomposition of the organic matter present in water stream present as food for the
living organism
C. BOD is expressed in mg/litre (typically, BOD=2.5 mg/litre for potable water)
D. None of these

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