In how many of the following sulphur compounds. Sulphur atom is in  ${\text{sp}}^{\text{2}}$ hybridization?

$\text{SO},{\text{ SO}}_{\text{2}},{\text{ S}}_{\text{2}}\text{O},{\text{ SO}}_{\text{3}},{\text{ H}}_{\text{2}}{\text{S}}_{\text{2}}{\text{O}}_{\text{2}},{\text{ H}}_{\text{2}}{\text{S}}_{\text{2}}{\text{O}}_{\text{3}},{\text{ H}}_{\text{2}}{\text{SO}}_{\text{3}}$