There is no $\mathrm{S}-\mathrm{S}$ bond in

For ${\mathrm{S}}_2{\mathrm{O}}_4{ }^{2-}$,

$\text{ For }{\mathrm{S}}_4{\mathrm{O}}_6{}^{2-}\text{, }$

$\text{ For }{\mathrm{S}}_2{\mathrm{O}}_3{}^{2-}\text{, }$

$\text{ For }{\mathrm{S}}_2{\mathrm{O}}_7{}^{2-}\text{, }$

$\text{ Thus, }{\mathrm{S}}_2{\mathrm{O}}_4{}^{2-},{\mathrm{S}}_4{\mathrm{O}}_6{}^{2-}\text{ and }{\mathrm{S}}_2{\mathrm{O}}_3{}^{2-}\text{ has }\mathrm{S}-\mathrm{S}\text{ bond in it. }$