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Aerobic biological oxidation ponds used for the purification of polluted water | |
A. | destroys/removes pathogen from the sewage. [Wrong Answer] |
B. | is not very effective for nonbiodegradable substances (e.g. ABS) containing effluents. [Wrong Answer] |
C. | destroys/removes pathogen much more effectively if the sewage is chlorinated. [Wrong Answer] |
D. | all (a), (b) & (c). [Correct Answer] |