Which one of the following compounds on reaction with ${\mathrm{Na}}_2{\mathrm{O}}_2$ in alkaline medium gives yellow colour solution?

$\mathrm{Cr}(\mathrm{OH}{)}_3$ compounds on reaction with ${\mathrm{Na}}_2{\mathrm{O}}_2$ in alkaline medium gives yellow colour solution

$\begin{array}{r}2\mathrm{Cr}(\mathrm{OH}{)}_3+\underset{\begin{array}{r}\left(\mathrm{From}\right.\\ {\mathrm{Na}}_2{\mathrm{O}}_2\end{array}}{3\left[\mathrm{O}\right]}+4\mathrm{NaOH}\to 2{\mathrm{Na}}_2{\mathrm{CrO}}_4+5{\mathrm{H}}_2\mathrm{O}\end{array}$