Which is the best description of the behaviour of bromine in the reaction given below

${\mathrm{H}}_2\mathrm{O} + {\mathrm{Br}}_2 \to \mathrm{HOBr} + \mathrm{HBr}$

 

${\mathrm{H}}_2\mathrm{O} + {\stackrel{0}{\mathrm{Br}}}_2 \to \mathrm{HO}\stackrel{+1}{\mathrm{Br} }+ \mathrm{H}\stackrel{-1}{\mathrm{Br}}$

In this above reaction the oxidation number of ${\mathrm{Br}}_2$ increases from zero (in ${\mathrm{Br}}_2$) to +1 (in HOBr) and decreases from zero (${\mathrm{Br}}_2$) to - 1 (in HBr). Thus ${\mathrm{Br}}_2$ is oxidized as well as reduced and hence it is a redox reaction.