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 below:

1. A \((A)\) is false but \((R)\) is true.
2. B Both \((A)\) and \((R)\) are correct but \((R)\) is not the correct explanation of \((\mathrm{A})\)
3. C \((A)\) is true but \((R)\) is false
4. D Both \((A)\) and \((R)\) are correct and \((R)\) is the correct explanation of \((\mathrm{A})\)