1.

Question : In which one of the following the BOD (Bio-chemical Oxygen Demand) of Sewage (S), distillery effluent (DE(, paper milleffluent (PE) and sugar mill effluent (SE) have been arranged in ascending order:

Answer»

`SeltPeltSltDE`
`SltDEltPEltSE`
`SEltSltPtltDE`

ANSWER :B


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