$\quad\quad\downarrow$

${Mn}^{3+} {CN}^{-} \quad {Fe}^{3+}, {CN}^{-} \quad {Co}^{3+}, {C}_{2} {O}_{4}^{2-}$

${d}^{4}$ configuration, $SFLd^{5}$ configuration, $SFL d^6$ configuration, Chelatingligand

$\Rightarrow$ All will have larger splitting hence $d^{2} {sp}^{3}$ hybridisation.

$\left[{MnCl}_{6}\right]^{3-} \quad$ and $\quad\left[{FeF}_{6}\right]^{3-}$

${d}^{4}$ configuration, ${Cl}^{-} \quad {d}^{5}$ configuration, ${F}^{-}$

$\underline1\, \underline{} \quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad \underline1\, \underline{1}$

$\underline1\, \underline{1}\,\underline{1} \quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad \underline1\, \underline{1}\,\underline{1}$

$4 \text { unpaired electrons } \quad\quad5 \text { unpaired electrons }$