To avoid, formation of toxic compounds with chlorine which of the followings is better to use as a disinfectant of water:

Explanation

Chlorine is frequently used to disinfect water. Chlorine treatment is very effective in killing the pathogens that may cause serious water-borne diseases such as typhoid and cholera. Chlorination of water containing organic materials also forms some organic compounds which are toxic. To avoide the formation of toxic compounds with chlorine, ozone or chlorine dioxide is used for the disinfection of water.