According to the Valence Shell Electron Pair Repulsion $(VSEPR)$ theory,what is the shape of $ClO_3^-$?

Which of the following shapes cannot be obtained from trigonal bipyramidal geometry?

The sets of molecules in which the central atom has no lone pair of electrons are:
$i$. $SnCl_2, NH_3, SF_4$
$ii$. $HgCl_2, SO_3, SF_6$
$iii$. $BeCl_2, BF_3, PCl_5$
$iv$. $ClF_3, BrF_5, XeF_6$

In which of the following conversions does a planar compound change into a non-planar compound?
$(a)$ $ClF_3 \rightarrow ClF_4^{-}$
$(b)$ $NH_2^{-} \rightarrow NH_4^{+}$
$(c)$ $I_3^{+} \rightarrow I_3^{-}$
$(d)$ $SO_2 \rightarrow SO_3$

The shape of the $O_2F_2$ molecule is similar to which of the following?

Which of the following contains the maximum number of lone pairs on the central atom?