Amongst ${\mathrm{SF}}_4, {\mathrm{XeF}}_4, {\mathrm{CF}}_4 \mathrm{and} {\mathrm{H}}_2\mathrm{O}$, the number of species with two lone pairs of electrons on central atom are _______ .

Number of lone pair on central atom of SF₄ is one.

There is no lone pairs in CF₄.

Number of lone pairs in ${\mathrm{H}}_2\mathrm{O}$ and ${\mathrm{XeF}}_4$ is 2.