A : Formaldehyde undergoes Cannizzaro reaction in the presence of `H^(+)`.
R : Formaldehyde has two `alpha`-Hydrogen atoms.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).
C. If Assertion is true statement but Reason is false, then mark (3).
D. If both Assertion and Reason are false statements, then mark (4).

Answer

To solve the question regarding the assertion and reason provided, we need to analyze both statements carefully.

### Step 1: Understand the Assertion
The assertion states: "Formaldehyde undergoes Cannizzaro reaction in the presence of H+."

- The Cannizzaro reaction is a redox reaction that occurs in aldehydes that do not have alpha-hydrogens. In this reaction, one molecule of aldehyde is oxidized to a carboxylic acid while another molecule is reduced to an alcohol.
- Formaldehyde (HCHO) is the simplest aldehyde and does not have any alpha-hydrogens, as it has no carbon atoms adjacent to the carbonyl group (C=O).

**Conclusion for Assertion**: The assertion is true because formaldehyde does undergo Cannizzaro reaction in the presence of H+.

### Step 2: Understand the Reason
The reason states: "Formaldehyde has two alpha-hydrogen atoms."

- Alpha-hydrogens are the hydrogen atoms attached to the carbon atom adjacent to the carbonyl carbon.
- In the case of formaldehyde (HCHO), there are no alpha-hydrogens because there is only one carbon atom, and thus no adjacent carbon to provide alpha-hydrogens.

**Conclusion for Reason**: The reason is false because formaldehyde does not have any alpha-hydrogens.

### Final Conclusion
- The assertion is true, and the reason is false. Therefore, the correct answer to the question is that the assertion is true, and the reason is false.

### Summary of the Answer:
- Assertion (A): True
- Reason (R): False