Oil and grease present in an emulsified state in waste water discharged from industries can be removed by

Question: Oil and grease present in an emulsified state in waste water discharged from industries can be removed by
[A]. biological oxidation.

[B].

skimming off.

[C].

settling out using chemical reagents.

[D].

chlorination.

Answer: Option C

Explanation:

No answer description available for this question.