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Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in | |
A. | coagulation and flocculation of colloids. [Wrong Answer] |
B. | oxidation of carbonaceous matter to CO2. [Wrong Answer] |
C. | nitrification or oxidation of ammonia derived from breakdown of nitrogeneous organic matter to the nitrite and eventually to the nitrate. [Wrong Answer] |
D. | all (a), (b) and (c). [Correct Answer] |