Periodic Table and Periodicity

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: $\mathrm{H}_2 \mathrm{Te}$ is more acidic than $\mathrm{H}_2 \mathrm{~S}$. Reason R: Bond dissociation enthalpy of $\mathrm{H}_2 \mathrm{Te}$ is lower than $\mathrm{H}_2 \mathrm{~S}$. In the light of the above statements, choose the most appropriate from the options given below: