Answer
Please see the work below.
Work Step by Step
We know that
a.$ BeF_2$ is an $Ax_2$ molecule and has a linear geometry and it is depicted by orbital drawing (i).
b.$ SiF_4$ is an $Ax_4$ molecule and has a tetrahedral geometry and it is depicted by orbital drawing (iii).
c.$ SeF_4$ is an $Ax_4$ molecule and has a seesaw geometry and it is depicted by orbital drawing (iv).
d.$ RnF_4$ is an $Ax_4$ molecule and has a planar geometry and it is depicted by orbital drawing (v).