Which among the following molecules have ${\mathrm{sp}}^3\mathrm{d}$ hybridization with one lone pair of electrons on the central atom?

(P) ${\mathrm{SF}}_4$

(Q) ${\left[{\mathrm{PCl}}_4\right]}^{+}$

(R) ${\mathrm{XeO}}_2{\mathrm{F}}_2$

(S) ${\mathrm{ClOF}}_3$

In ${\mathrm{SF}}_4$, sulfur atom contains one lone pair of electrons and has ${\mathrm{sp}}^3\mathrm{d}$ hybridization. 

In ${\mathrm{XeO}}_2{\mathrm{F}}_2$, Xe atom contains one lone pair of electrons and has ${\mathrm{sp}}^3\mathrm{d}$ hybridization.

In ${\mathrm{ClOF}}_3,\mathrm{Cl}$ atom contain one lone pair of electrons and has ${\mathrm{sp}}^3\mathrm{d}$ hybridization.

Hence, the option B is correct.