Assertion (A): Ethylene adds on hypochlorous acid to give 2-chloroethanol.

Reason (R): Hypochlorous acid partially ionises in aqueous solution as  ${\text{H}}^{+}\text{\hspace{0.17em}and\hspace{0.17em}C}l{\text{O}}^{-}\text{ions}$ ions.

Both A and R are true and R is the correct explanation of A

A is correct and R is false

A is false but R is true

Both A and R are true and R is not correct explanation of A