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Biochemical Oxygen Demand (BOD) of sewage is the (a) Oxygen required to oxidise (b) Oxygen required to oxidise biologically inactive organic matter* (c) a and b both (d) none of these

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Biochemical Oxygen Demand (BOD) of sewage is the
(a) Oxygen required to oxidise
(b) Oxygen required to oxidise biologically inactive organic matter*
(c) a and b both
(d) none of these
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(b) Oxygen required to oxidise biologically inactive organic matter*
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