Oxidation state of $\mathrm{S}$ in ${\mathrm{H}}_2{\mathrm{S}}_2{\mathrm{O}}_8$ is

Assertion (A) : The bond dissociation energy increases from ${\mathrm{F}}_2$ to ${\mathrm{Cl}}_2$ and then decreases to ${\mathrm{I}}_2$

Reason (R) : The low bond energy of fluorine is due to the repulsion between the lone pairs of electrons in two fluorine atoms.
The correct option among the following is