Valence bond theory explained geometries of complexes with the help of hybridization concept.Which one of the following is a diamagnetic, inner orbital complex according to VBT

$$\begin{gathered} \mathrm{Co}(\mathrm{Z}=27)..\left[\mathrm{Ar}\right]4{\mathrm{s}}^{2}3{\mathrm{d}}^7 \\ {\mathrm{Co}}^{+3}.....\left[\mathrm{Ar}\right]3{\mathrm{d}}^6 \end{gathered}$$

$$\begin{gathered} \mathrm{Fe}(\mathrm{Z}=26) . . \left[\mathrm{Ar}\right]4{\mathrm{s}}^{2}3{\mathrm{d}}^6 \\ {\mathrm{Fe}}^{+3}. . . \left[\mathrm{Ar}\right]3{\mathrm{d}}^5 \end{gathered}$$

option (1) … inner orbital complex … ${\mathrm{\mu }}_{\mathrm{s}}=0$

option (2) … outer orbital complex … ${\mathrm{\mu }}_{\mathrm{s}}=4.9 \mathrm{B}.\mathrm{M}$

option (3) … inner orbital complex … ${\mathrm{\mu }}_{\mathrm{s}}=1.732 \mathrm{B}.\mathrm{M}$

option (4) … outer orbital complex … ${\mathrm{\mu }}_{\mathrm{s}}=5.9 \mathrm{B}.\mathrm{M}$