Explanation

(c)
Chlorine acts as oxidising and bleaching agent in the presence of moisture. Chlorine reacts with water forming HCl and HCIOz. HCIO further decomposes to give nascent oxygen which is responsible for oxidising and bleaching properties of chlorine. Thus in chlorine water, oxidising agent is HOCI.
Cl_{2}+H_{2}O⟶HCl+HCIO
$\frac{\ \ \ \ \ \ \ HCIO \longrightarrow HCl + O}{{Cl}_{2} + H_{2}O \longrightarrow 2HCl + O\ }$