Surface Chemistry

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R

Assertion A: Amongst \(\mathrm{He}, \mathrm{Ne}, \mathrm{Ar}\) and \(\mathrm{Kr}\); 1\(\mathrm{g}\) of activated charcoal adsorbs more of \(\mathrm{Kr}\).

Reason R: The critical volume \(\mathrm{V}_{\mathrm{c}}\left(\mathrm{cm}^{3} \mathrm{~mol}^{-1}\right)\) and critical pressure \(\mathrm{P}_{\mathrm{c}}\) (atm) is highest for Krypton but the compressibility factor at critical point \(\mathrm{Z}_{\mathrm{c}}\) is lowest for Krypton.

In the light of the above statements, choose the correct answer from the options given below