$$\begin{array}{lll} {\left[\mathrm{FeF}_6\right]^{3-}} & \text { Paramagnetic } & \mathrm{sp}^3 \mathrm{~d}^2 \\ {\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}} & \text { Paramagnetic } & \mathrm{d}^2 \mathrm{sp}^3 \\ {\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-}} & \text { Paramagnetic } & \mathrm{d}^2 \mathrm{sp}^3 \\ {\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}} & \text { Diamagnetic } & \mathrm{d}^2 \mathrm{sp}^3 \\ {\left[\mathrm{MnCl}_6\right]^{3-}} & \text { Paramagnetic } & \mathrm{sp}^3 \mathrm{~d}^2 \\ {\left[\mathrm{CoF}_6\right]^{3-}} & \text { Paramagnetic } & \mathrm{sp}^3 \mathrm{~d}^2 \end{array}$$

Only $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$ and $\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-}$ are paramagnetic and $\mathrm{d}^2 \mathrm{sp}^3$ hybridisation of metal.