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Question
Pick out the wrong statement.
Options:
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
Answer: Option D
Answer: (d).none of these
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