$(I)\, [CrCl_2(NO_2)_2(NH_3)_2]^-$ $(II)\, [Co(NO_2)_3(NH_3)_3]$
$(III)\, [PtCl(NO_2)(NH_3 )(py)]$ $(IV)\, [PtBrCl(en)]$
$(I)\,\,\,-\,\,\,(II)\,\,\,-\,\,\,(III)\,\,\,-\,\,\,(IV)$

| સૂચિ $-I$ | સૂચિ $-II$ |
| $A$ $Ni ( CO )_{4}$ | $I$ $sp ^{3}$ |
| $B$ ${\left[ Ni ( CN )_{4}\right]^{2-} }$ | $II$ $S p^{3} d^{2}$ |
| $C$ ${\left[ Co ( CN )_{6}\right]^{3-} }$ | $III$ ${d^{2}}$ |
| $D$ ${\left[ CoF _{6}\right]^{3-} }$ | $IV$ ${s p^{3}}{d s p^{2}}$ |
નીચે આપેલા વિકલ્પોમાંથી સાચો જવાબ પસંદ કરો.
$\mathrm{NO}_2^{-}, \mathrm{SCN}^{-}, \mathrm{C}_2 \mathrm{O}_4^{2-}, \mathrm{NH}_3, \mathrm{CN}^{-}, \mathrm{SO}_4^{2-}, \mathrm{H}_2 \mathrm{O}$.