Given below are two statements one is labelled as Assertion A and the other is labelled as Reason R. Assertion $\mathrm{A}: \mathrm{SO}_2(\mathrm{~g})$ is adsorbed to a large extent than $\mathrm{H}_2(\mathrm{~g})$ on activated charcoal. Reason $\mathrm{R}_6: \mathrm{SO}_2(\mathrm{~g})$ has a higher critical temperature than $\mathrm{H}_2(\mathrm{~g})$. In the light of the above statements, choose the most appropriate answer from the options given below.