Given below are two statements ; one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A) : A simple distillation can be used to separate a mixture of propanol and propanone.
Reason (R) : Two liquids with a difference of more than $20^{\circ} \mathrm{C}$ in their boiling points can be separated by simple distillations.
In the light of the above statements, choose the most appropriate answer from the options given belowi