Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A)$: Ketoses give Seliwanoff's test faster than Aldoses.
Reason $(R)$: Ketoses undergo $\beta$-elimination followed by formation of furfural.
In the light of the above statements,choose the correct answer from the options given below:

• A
  $(A)$ is false but $(R)$ is true
• B
  Both $(A)$ and $(R)$ are true and $(R)$ is the correct explanation of $(A)$
• C
  $(A)$ is true but $(R)$ is false
• D
  Both $(A)$ and $(R)$ are true but $(R)$ is not the correct explanation of $(A)$