Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A :$ The escape velocities of planet $A$ and $B$ are same. But $A$ and $B$ are of unequal mass.
Reason $R :$ The product of their mass and radius must be same,$M_{1}R_{1} = M_{2}R_{2}$.
In the light of the above statements,choose the most appropriate answer from the options given below.

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