When $Cl_2$ gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from

Question

$\begin{array}{1 1} \text{(a) zero to +1 and zero to -5} \\ \text{ (b) zero to -1 and zero to +5} \\ \text{ (c) zero to -1 and zero to +5} \\ \text{ (d) zero to +1 and zero to -3 } \end{array} $