Assertion: Wurtz reaction is not preferred for the preparation of alkanes containing odd number of carbon atoms.
Reason: It is not possible to prepare alkanes with odd number of carbon atoms through wurtz reaction.

Options

A. If both assertion and reson 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.

Explanation

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

### Step-by-Step Solution:

1. **Understanding the Wurtz Reaction**:
The Wurtz reaction involves the coupling of alkyl halides in the presence of sodium metal, typically in dry ether. This reaction is used to synthesize alkanes.

2. **Formation of Alkanes**:
In the Wurtz reaction, two alkyl halides react with sodium to form a symmetrical alkane. The general reaction can be represented as:
\[ 2 R-X + 2 Na \rightarrow R-R + 2 NaX \]
where \( R \) is the alkyl group and \( X \) is the halogen.

3. **Odd vs. Even Number of Carbon Atoms**:
The key point here is that the Wurtz reaction tends to produce alkanes with an even number of carbon atoms. This is because when two free radicals combine, they can only form a symmetrical product. For example, if you start with two alkyl groups containing an odd number of carbon atoms, the resulting product will still yield an even number of carbon atoms.

4. **Assertion Analysis**:
The assertion states that the Wurtz reaction is not preferred for the preparation of alkanes containing an odd number of carbon atoms. This is true because the reaction primarily yields even-numbered alkanes.

5. **Reason Analysis**:
The reason states that it is not possible to prepare alkanes with an odd number of carbon atoms through the Wurtz reaction. This is also true, as explained above, because the reaction results in symmetrical products.

6. **Conclusion**:
Both the assertion and the reason are true, and the reason correctly explains the assertion. Therefore, the correct answer is that both statements are true, and the reason supports the assertion.

### Final Answer:
- **Assertion**: True
- **Reason**: True
- **Conclusion**: Both the assertion and reason are correct, and the reason correctly explains the assertion.