Amongst SF 4 , XeF 4 , CF 4 and H 2 O , the number of species with two lone pairs of electrons is

Electrons which are not involved in the bond formation are called the lone pair of electrons.

As we can see from the structures ${\mathrm{XeF}}_4, {\mathrm{H}}_2\mathrm{O}$ are having two lone pairs on the central atom.