A : 2-methyl propanal can give Cannizzaro reaction as well as aldol condensation.
R : It has `alpha`-hydrogen atom.

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 false statement but Reason is true, then mark (3).
D. If both Assertion and Reason are false statements, then mark (4).

Answer

To solve the question, we need to analyze the assertion and reason provided:

**Assertion (A):** 2-methylpropanal can give Cannizzaro reaction as well as aldol condensation.
**Reason (R):** It has alpha-hydrogen atom.

### Step 1: Understanding the Cannizzaro Reaction
The Cannizzaro reaction occurs with aldehydes that do not have alpha-hydrogen atoms. In this reaction, one molecule of the aldehyde is oxidized to a carboxylic acid, while another molecule is reduced to an alcohol.

### Step 2: Identifying the Structure of 2-Methylpropanal
2-Methylpropanal (also known as isobutyraldehyde) has the following structure:
- CH3-CH(CH3)-CH2-CHO

In this structure, we can identify the alpha-carbon (the carbon adjacent to the carbonyl group) and the alpha-hydrogens.

### Step 3: Checking for Alpha-Hydrogens
In 2-methylpropanal:
- The alpha-carbon is the carbon attached to the carbonyl (CHO).
- The alpha-hydrogens are the hydrogens attached to the alpha-carbon.

Since 2-methylpropanal has an alpha-carbon with attached hydrogens, it has alpha-hydrogens.

### Step 4: Aldol Condensation
Aldol condensation occurs when aldehydes (or ketones) with alpha-hydrogens undergo a reaction in which they form a β-hydroxy aldehyde (or ketone) upon reaction with themselves or another carbonyl compound. Since 2-methylpropanal has alpha-hydrogens, it can undergo aldol condensation.

### Step 5: Conclusion
- **Assertion (A)** is false because 2-methylpropanal cannot undergo the Cannizzaro reaction (it has alpha-hydrogens).
- **Reason (R)** is true because 2-methylpropanal does have alpha-hydrogens.

Thus, the correct answer is that the assertion is false, and the reason is true.

### Final Answer
The assertion is false, and the reason is true. Therefore, the correct option is that the assertion is false while the reason is true.

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