Column IColumn IIP. Grit chamber1. Zone settlingQ. Secondary settling tank2. Stoke s lawR. Activated sludge process3. AerobicS. Trickling filter4. Contact stabilisation

Column IColumn IIP. Grit chamber1. Zone settlingQ. Secondary settling

1.	Column IColumn IIP. Grit chamber1. Zone settlingQ. Secondary settling tank2. Stoke s lawR. Activated sludge process3. AerobicS. Trickling filter4. Contact stabilisation
A.	P-1, Q-2, R-3, S-4
B.	P-2, Q-1, R-3, S-4
C.	P-1, Q-2, R-4, S-3
D.	P-2, Q-1, R-4, S-3
Answer» C. P-1, Q-2, R-4, S-3

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Column IColumn IIP. Grit chamber1. Zone settlingQ. Secondary settling tank2. Stoke s lawR. Activated sludge process3. AerobicS. Trickling filter4. Contact stabilisation

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