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:

We need to evaluate the Assertion-Reason pair about Seliwanoff's test.

Assertion (A): Ketoses give Seliwanoff's test faster than Aldoses.

This is TRUE. In Seliwanoff's test (using resorcinol and HCl), ketoses react faster and give a cherry-red color more quickly than aldoses. This is because ketoses are more readily dehydrated than aldoses.

Reason (R): Ketoses undergo $$\beta$$-elimination followed by formation of furfural.

This is FALSE. Ketoses (like fructose, a hexose) undergo dehydration to form hydroxymethylfurfural (HMF), not furfural. Furfural is formed from pentoses. The hydroxymethylfurfural then reacts with resorcinol to give the cherry-red color.

Since A is true but R is false:

The correct answer is Option 3: (A) is true but (R) is false.