What happens when HCl reacts with water?

The correct option is C Both ${\text{H}}^{+}$ and ${\text{Cl}}^{-}$ are formed
Hydrochloric acid is a strong acid which dissociates into ${\text{H}}^{+}$ and ${\text{Cl}}^{-}$ ions in water. This process is a highly exothermic reaction. The reaction takes place as follows:

$\text{HCl}\text{(aq)}\rightleftharpoons {\text{H}}^{+}\text{(aq)}+{\text{Cl}}^{-}\text{(aq)}$