This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
During the process of chlorination of water, the disinfecting action of chlorine is due to the formation of – 
Select and explain. 
A. Hydrochloric acid only, B. Hypochlorous acid only, C. Hydrochloric acid and hypochlorite ions, D. Hypochlorous acid and hypochlorite ions
D: Hypochlorous acid and hypochlorite ions
Answer: D: Hypochlorous acid and hypochlorite ions 
Explanation: None