During chlorination process, aqueous (aq) chlorine reacts rapidly with water to form $Cl^-,HOCl$, and $H^+$ as shown below $$Cl_2(aq)+H_2O\:{\large\rightleftharpoons}\:HOCl+Cl^-+H^+$$ The most active disinfectant in the chlorination process from amongst the following, is
- $H^+$
- $HOCl$
- $Cl^-$
- $H_2O$