ln which of the following molecular shape ${\mathrm{d}}_{{\mathrm{z}}^2}\text{-orbital }$ must not be involved in bonding ?

(1) $\text{ Pentagonal planar }\to {\mathrm{sp}}^3{\mathrm{d}}^3\left[\mathrm{s}+{\mathrm{p}}_{\mathrm{x}}+{\mathrm{p}}_{\mathrm{y}}+{\mathrm{p}}_{\mathrm{z}}+{\mathrm{d}}_{{\mathrm{x}}^2-{\mathrm{y}}^2}+{\mathrm{d}}_{{\mathrm{z}}^2}+{\mathrm{d}}_{\mathrm{xy}}\right]$

(2) $\text{ Trigonal planar }\to {\mathrm{sp}}^2[\mathrm{s}+\text{ Any two }\mathrm{p}]$

(3) $\text{ Linear }\to s{p}^2[s+\text{ any one }p]$

                     $\begin{array}{l}\to s{p}^2[s+\text{ any two }p]\\ \to s{p}^3\left[s+p_x+p_y+p_z\right]\\ \to s{p}^{3}d\left[s+p_x+p_y+p_z+d_z\right]\end{array}$

(4) $\text{ Square planar }\to {\mathrm{sp}}^3{\mathrm{d}}^2\left[\mathrm{s}+{\mathrm{p}}_{\mathrm{x}}+{\mathrm{p}}_{\mathrm{y}}+{\mathrm{p}}_{\mathrm{z}}+{\mathrm{d}}_{{\mathrm{x}}^2-{\mathrm{y}}^2}+{\mathrm{d}}_{{\mathrm{z}}^2}\right]$