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
Disinfecting action of chlorine is due to ? 
Select and explain. 
A. Hypochlorous acid, B. Hypochlorite ion, C. Hydrochloric acid, D. Both Hypochlorous acid and Hypochlorite ion
D: Both Hypochlorous acid and Hypochlorite ion
Answer: D: Both Hypochlorous acid and Hypochlorite ion 
Explanation: None