In which one of the following the BOD (Biochemical Oxygen Demand) of sewage (S), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order?
A
S < DE < PE < SE
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B
SE < S < PE < DE
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C
SE < PE < S < DE
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D
PE < S < SE < DE
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Solution
The correct option is A S < DE < PE < SE BOD has been arranged in ascending order of sewage(S) < Distillary effluent (DE) < Paper mill effluent (PE) < Sugar mill effluent (SE).