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Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of | |
A. | ozone and iodine. [Wrong Answer] |
B. | chlorine or its compounds. [Wrong Answer] |
C. | ultraviolet light for irradiation of water. [Wrong Answer] |
D. | all (a), (b) & (c). [Correct Answer] |