Considering the following three species, identify the incorrect order in the given options.

$\left(\mathrm{i}\right)$ ${\mathrm{ClO}}_4^{-}$ $\left(\mathrm{ii}\right)$ ${\mathrm{SO}}_4^{2-}$ $\left(\mathrm{iii}\right)$ ${\mathrm{PO}}_4^{3-}$

The total number of covalent bonds formed in the Lewis structures of given species respectively are:

(a) ${\mathrm{CO}}_3^{2-}$

(b) ${\mathrm{CCl}}_4$

(c) ${\mathrm{NF}}_3$

(d) ${\mathrm{HNO}}_3$