Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Ketoses eseive Selivanonf's test faster than Aldoses.
Reason (R): Ketose sundergo Belimination followed by formation of furfural.
In the light of above statements,choose the correct answer from the options given below

Options

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

Answer

To solve the question, we need to analyze the two statements given: the Assertion (A) and the Reason (R).

### Step 1: Analyze the Assertion (A)
The assertion states: "Ketoses give Selevenov's test faster than Aldoses."

- **Understanding Selevenov's Test**: This test is used to differentiate between aldoses and ketoses. Ketoses, particularly ketohexoses, tend to undergo dehydration more rapidly than aldoses when heated in an acidic medium. This leads to the formation of a compound that can react with resorcinol to produce a colored complex, indicating a positive test.

- **Conclusion for Assertion**: The assertion is **true** because ketoses do indeed give the Selevenov's test faster than aldoses due to their ability to dehydrate more readily.

### Step 2: Analyze the Reason (R)
The reason states: "Ketoses undergo elimination followed by formation of furfural."

- **Understanding the Process**: When ketoses are heated in an acidic medium, they undergo dehydration to form 5-hydroxymethylfurfural (HMF), not furfural directly. Furfural is typically derived from pentoses, while HMF is a product of hexoses. The statement in the reason is misleading because it incorrectly describes the process.

- **Conclusion for Reason**: The reason is **false** because it inaccurately describes the product formed during the dehydration of ketoses.

### Final Conclusion
- **Assertion (A)** is **true**.
- **Reason (R)** is **false**.

### Answer
The correct answer is that the assertion is true, but the reason is false.

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