Which of the following has ${\mathrm{sp}}^3$ hybridization?

${\mathrm{XeO}}_3$​ shows ${\mathrm{sp}}^3$ hybridization since there are 3 sigma bond pairs and 1 lone pair of electrons in the central $\mathrm{Xe}$ atom.

$Xe{O}_3\mathit{\to }s{p}^{\mathit{3}}\mathit{.}\mathit{ }hyb$

Hence, the correct option is C.