Consider the following unit processes commonly used in water treatment; rapid mixing (RM), flocculation (F), primary sedimentation (PS), secondary sedimentation (SS), chlorination (C) and rapid sand filteration (RSF). The order of these unit processes (first to last) in a conventional water treatment plant is

Consider the following unit processes commonly used in water treatment

1.	Consider the following unit processes commonly used in water treatment; rapid mixing (RM), flocculation (F), primary sedimentation (PS), secondary sedimentation (SS), chlorination (C) and rapid sand filteration (RSF). The order of these unit processes (first to last) in a conventional water treatment plant is
A.	PS RSF F RM SS C
B.	PS F RM RSF SS C
C.	PS F SS RSF RM C
D.	PS RM F SS RSF C
Answer» E.

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