Assertion : `2, 2-` Dimethylpropanal undergoes Cannizzaro reaction with conc. `NaOH`
Reason : Cannizzaro reaction is a disproportionation reaction

Options

A. Statement-I is True, Statement-II is True : Statement-II is a correct explanation for Statement-I
B. Statement-I is True, Statement-II is True : Statement-II is `NOT` a correct explanation for Statement-I
C. Statement-I is True, Statement-II is False.
D. Statement-I is False, Statement-II is True.

Answer

To solve the question regarding the assertion and reason about the Cannizzaro reaction involving 2,2-dimethylpropanal, we can break it down into several steps:

### Step 1: Understanding the Assertion
The assertion states that "2,2-dimethylpropanal undergoes Cannizzaro reaction with concentrated NaOH."

**Explanation**: The Cannizzaro reaction occurs with aldehydes that do not have alpha-hydrogens. 2,2-dimethylpropanal (also known as neopentanal) does not have any alpha-hydrogens, making it a suitable candidate for the Cannizzaro reaction.

### Step 2: Understanding the Reason
The reason states that "Cannizzaro reaction is a disproportionation reaction."

**Explanation**: In a disproportionation reaction, a single substance is both oxidized and reduced. In the Cannizzaro reaction, one molecule of the aldehyde is oxidized to a carboxylic acid, while another molecule is reduced to an alcohol. This confirms that the Cannizzaro reaction is indeed a disproportionation reaction.

### Step 3: Evaluating the Relationship Between Assertion and Reason
Now we need to determine if the reason provided is a valid explanation for the assertion.

- The assertion is true: 2,2-dimethylpropanal does undergo Cannizzaro reaction in the presence of concentrated NaOH.
- The reason is also true: Cannizzaro reaction is a disproportionation reaction.

However, while both statements are true, the reason does not specifically explain why 2,2-dimethylpropanal undergoes the Cannizzaro reaction. The assertion stands on its own based on the absence of alpha-hydrogens, which is not mentioned in the reason.

### Conclusion
Both the assertion and reason are true, but the reason is not the correct explanation for the assertion. Therefore, the answer to the question is that the assertion is true, the reason is true, but the reason does not explain the assertion.

### Final Answer:
- Assertion: True
- Reason: True
- Explanation: The reason does not explain the assertion.