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Question : 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 ?

Answer»

SE < PE< S < DE
PE < S < SE < DE
S < DE < PE < SE
SE < S < PE < DE

Answer :B


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