Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Amongst He, Ne, Ar and Kr; 1 g of activated charcoal adsorbs more of Kr.
Reason R: The critical volume $$V_c$$ $$(cm^3 mol^{-1})$$ and critical pressure $$P_c$$ (atm) is highest for Krypton but the compressibility factor at critical point $$Z_c$$ is lowest for Krypton.
In the light of the above statements, choose the correct answer from the options given below.