Chlorine on reaction with hot and concentrated sodium hydroxide gives:

$\mathrm{Cl}^{-}$and $\mathrm{ClO}_{2}^{-}$

$\mathrm{Cl}^{-}$and $\mathrm{ClO}_{3}^{-}$

$\mathrm{Cl}^{-}$and $\mathrm{ClO}^{-}$

$\mathrm{ClO}_{3}^{-}$and $\mathrm{ClO}_{2}^{-}$