How many pairs out of following have equal number of lone pairs on central atom?

${\mathrm{XeF}}_5^{+},{\mathrm{SO}}_2{\mathrm{Cl}}_2,{\mathrm{NH}}_2^{-},{\mathrm{XeF}}_4$

The equal number of lone pair of ${\mathrm{XeF}}_5^{+},{\mathrm{SO}}_2{\mathrm{Cl}}_2,{\mathrm{NH}}_2^{-},{\mathrm{XeF}}_4$ are 1,0,2 and 2 respectively.

Only ${\mathrm{XeF}}_4$ has  have 1 equal number of lone pairs on central atom.

If two electrons are paired but aren't utilized in chemical bonding, they are consequently referred to as lone pairs.

 So, the amount of valence electrons around an atom is equal to the sum of the number of electrons in lone pairs and the number of electrons in bonds.

Hence the total pair have equal number of lone pairs on central atom is 1.