Answer:
Option B, Halogens
Step-by-step explanation:
Halogens are group of chemicals that consists of chemicals such as iodine, chlorine, and fluorine and are used as disinfectant.
Chlorine is the most commonly used halogen. It is sometimes mixed with metals to form compounds such as sodium hypochlorite or Bleach which are used as common household disinfectant
All Hypochlorite compound including sodium and calcium hypochlorites, are used to clean the water of swimming pools.
Hence, Bleach is an example of halogens
Option B is correct.