Which of the following acids contains $\mathrm{S}-\mathrm{S}$ bond?

In chemical compounds like ${\mathrm{H}}_2{\mathrm{S}}_2{\mathrm{O}}_6$ the $\mathrm{S}-\mathrm{S}$ bond is the connection between two Sulphur atoms. $\mathrm{S}-\mathrm{S}$  bonds are not always present in compounds containing Sulphur; for example, Sulphur trioxide trimer $\left({\mathrm{S}}_3{\mathrm{O}}_9\right)$ and pyrosulphuric acid (oleum) both lack $\mathrm{S}-\mathrm{S}$ bonds.

Hence, option B is correct.