A. Ozone and iodine
B. Chlorine or its compounds
C. Ultraviolet light for irradiation of water
D. All A., B. & C.
Correct Answer: D. All A., B. & C. ✔
Last Updated: March 11, 2019
A. Ozone and iodine
B. Chlorine or its compounds
C. Ultraviolet light for irradiation of water
D. All A., B. & C.
Correct Answer: D. All A., B. & C. ✔
Last Updated: March 11, 2019