GATE ES 2026 ES Q20: Point and non-point sources of wastewater

Which ONE of the following options CORRECTLY matches the processes associated with the growth condition given in the table?

Process	Growth Condition
(P) Activated sludge process	(i) Anaerobic suspended growth
(Q) Anaerobic filter	(ii) Anaerobic attached growth
(R) Trickling filter	(iii) Aerobic suspended growth
(S) Anaerobic digestion	(iv) Aerobic attached growth

Your answerChoose one option.

(P) - (ii); (Q) - (iii); (R) - (iv); (S) - (i)

(P) - (iii); (Q) - (ii); (R) - (iv); (S) - (i)

(P) - (iii); (Q) - (i); (R) - (iv); (S) - (ii)

(P) - (iv); (Q) - (iii); (R) - (ii); (S) - (i)

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