Given below are two statements: one is labeled as Assertion A and the other is labeled as Reason R.

Assertion (A) : ${\mathrm{SO}}_{2( \mathrm{g})}$ is adsorbed to a larger extent than ${\mathrm{H}}_{2( \mathrm{g})}$ on activated charcoal

Reason (R) :SO₂(g) has a higher critical temperature than H₂(g). 

In the light of the above statements, choose the most appropriate answer from the options given below.

Adsorption of charcoal: Finely divided activated charcoal tends to adsorb gases like ammonia, Sulphur dioxide, chlorine, phosgene, etc. In this cases charcoal act as an adsorbent while gas molecules act as the adsorbate. ${\mathrm{SO}}_{2( \mathrm{g})}$ is adsorbed to a larger extent than ${\mathrm{H}}_{2( \mathrm{g})}$ on activated charcoal. ${\mathrm{SO}}_{2( \mathrm{g})}$ is adsorbed to a larger extent than ${\mathrm{H}}_{2( \mathrm{g})}$ on activated charcoal. 

Both assertion and reason are correct.

Therefore, option B is correct.