Four species are listed below.

$\left(i\right) HC{O}^{-3}$;$\text{ (ii) }{\mathrm{H}}_3{\mathrm{O}}^{+}\text{, }$$\text{ (iii) }{\mathrm{HSO}}_4^{-}\text{, }$$\text{ (iv) }{\mathrm{HSO}}_3\mathrm{F}$

Which one of the following is the correct sequence of their acid strength?

${\mathrm{HCO}}_3^{-}$is the weakest acid. This is followed by ${\mathrm{HSO}}_4^{-}$ The strongest acid in aqueous solution is ${\mathrm{H}}_3{\mathrm{O}}^{+}$. The choice d indicates that the given acids follow the correct order