Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R.$
Assertion $A:$ $SO_{2(g)}$ is adsorbed to a larger extent than $H_{2(g)}$ on activated charcoal.
Reason $R:$ $SO_{2(g)}$ has a higher critical temperature than $H_{2(g)}.$
In the light of the above statements,choose the most appropriate answer from the options given below.

• A
  Both $A$ and $R$ are correct and $R$ is the correct explanation of $A$.
• B
  $A$ is not correct but $R$ is correct.
• C
  $A$ is correct but $R$ is not correct.
• D
  Both $A$ and $R$ are correct but $R$ is not the correct explanation of $A$.