A

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Q. 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
  • (B) Chlorine or its compounds
  • (C) Ultraviolet light for irradiation of water
  • (D) All (A), (B) & (C)

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