Assertion : `(CH_(3))_(3)C COOH` does not give HVZ reaction.
Reason : `(CH_(3))_(3)C COOH` does not have `alpha`-hydrogen atom.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Answer

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

### Step 1: Understanding the Assertion
The assertion states that `(CH₃)₃C COOH` (trimethylacetic acid) does not give the HVZ reaction.

**Hint:** Recall what the HVZ reaction is and what conditions are necessary for it to occur.

### Step 2: Understanding the HVZ Reaction
The HVZ reaction (Helmholtz-Chelensky reaction) involves the halogenation of carboxylic acids at the alpha carbon, which is the carbon adjacent to the carboxylic acid group. For this reaction to occur, the alpha carbon must have at least one hydrogen atom (alpha hydrogen) attached to it.

**Hint:** Identify the structure of the compound and locate the alpha carbon.

### Step 3: Analyzing the Structure of Trimethylacetic Acid
The structure of trimethylacetic acid can be represented as follows:
- The central carbon (the one bonded to the carboxylic acid group) is connected to three methyl groups (CH₃) and one carboxylic acid group (COOH).

This can be drawn as:
```
CH₃
|
CH₃ - C - COOH
|
CH₃
```
In this structure, the carbon that is bonded to the COOH group is the alpha carbon.

**Hint:** Count the number of hydrogen atoms attached to the alpha carbon.

### Step 4: Identifying Alpha Hydrogen
In the case of trimethylacetic acid, the alpha carbon (the one connected to the carboxylic acid) does not have any hydrogen atoms attached to it because it is bonded to three methyl groups.

**Hint:** Recall the definition of alpha hydrogen and check if it is present.

### Step 5: Conclusion on the Assertion
Since the alpha carbon does not have any hydrogen atoms, the HVZ reaction cannot occur. Therefore, the assertion that trimethylacetic acid does not give the HVZ reaction is correct.

**Hint:** Consider the implications of the absence of alpha hydrogen on the reaction.

### Step 6: Analyzing the Reason
The reason states that `(CH₃)₃C COOH` does not have alpha-hydrogen atoms. This is also true, as we have established that the alpha carbon in trimethylacetic acid is fully substituted with methyl groups and lacks hydrogen.

**Hint:** Verify if the reason logically supports the assertion.

### Final Conclusion
Both the assertion and the reason are correct, and the reason correctly explains why the assertion is true. Thus, the answer to the question is:

**Answer:** A (Both assertion and reason are correct, and the reason is the correct explanation for the assertion.)