Which of the following structure is the most preferred structure for ${\mathrm{SO}}_3?$

In how many of the following molecules is the central atom surrounded by atleast $10$ electrons?

(i) ${\mathrm{ClO}}_2$ (ii) ${\mathrm{NO}}_3^{-}$ (iii) ${\mathrm{O}}_3$ (iv) ${\mathrm{PCl}}_5$ (v) ${\mathrm{SO}}_3$ (vi) ${\mathrm{SO}}_4^{2-}$ (vii) ${\mathrm{CO}}_2$ (viii) ${\mathrm{N}}_3^{-}$ (ix) ${\mathrm{I}}_3^{-}$

Number of molecule or ions having lone pairs $\ge 2$ for the central atom are:

(i) ${\mathrm{HClO}}_4$ (ii) ${\mathrm{HClO}}_3$ (iii) ${\mathrm{HClO}}_2$ (iv) ${\mathrm{H}}_2\mathrm{O}$ (v) ${\mathrm{NH}}_2^{-1}$ (vi) ${\mathrm{CIF}}_3$ (vii) ${\mathrm{XeF}}_2$ (viii) ${\mathrm{XeF}}_4$ (ix) ${\mathrm{XeF}}_6$ (x) ${\mathrm{I}}_3^{-1}$ (xi) ${\mathrm{N}}_3^{-1}$ (xii) ${\mathrm{O}}_3$ (xiii) ${\mathrm{ICl}}_4^{-}$ (xiv) ${\mathrm{ICl}}_2^{+}$ (xv) ${\mathrm{XeO}}_3$ (xvi) ${\mathrm{XeF}}_5^{-1}$