Correct option is C
Coagulation is a chemical treatment process in water treatment. During coagulation, chemicals called coagulants are added to water to facilitate the aggregation of small particles into larger particles (flocs) that can then be easily removed by sedimentation and filtration.
Information booster:
(a) Filtration: This is a physical process that removes particles from water by passing it through a filter.
(b) Sedimentation: This is a physical process where particles settle at the bottom of a tank.
(d) Screening: This is a physical process where large particles are removed by passing water through screens.
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