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(D) The $BOD$ (Biochemical Oxygen Demand) is a measure of the organic matter present in water. Higher organic content leads to higher microbial activi

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$SE < S < PE < DE$

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(D) The $BOD$ (Biochemical Oxygen Demand) is a measure of the organic matter present in water. Higher organic content leads to higher microbial activity and thus higher $BOD$.$1$. Sewage $(S)$ typically has a moderate $BOD$ compared to industrial effluents.$2$. Sugar Mill Effluent $(SE)$ is rich in sugars,but often has lower $BOD$ than paper or distillery waste.$3$. Paper Mill Effluent $(PE)$ contains high amounts of cellulose and organic additives.$4$. Distillery Effluent $(DE)$ is known for having an extremely high $BOD$ due to the presence of molasses and other organic residues from fermentation.Based on standard environmental data,the increasing order of $BOD$ is $SE < S < PE < DE$.

Arrange the following in increasing order of their $BOD$ values: Sewage $(S)$,Distillery Effluent $(DE)$,Paper Mill Effluent $(PE)$,and Sugar Mill Effluent $(SE)$.

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