Assertion: Plasmids are being widely used as vehicle DNA.
Reason: They can easily isolate and introduce viral genome.

Options

A. If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
B. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.
C. If Assertion is true but the Reason is false.
D. If both Assertion and Reasom are false.

Answer

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

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Plasmids are being widely used as vehicle DNA."
- Plasmids are small, circular pieces of DNA that exist independently of chromosomal DNA in bacteria. They can carry genes and are commonly used in genetic engineering as vectors to transfer genetic material.

2. **Understanding the Reason**:
- The reason states that "They can easily isolate and introduce viral genome."
- Plasmids can be easily isolated from bacterial cells due to their small size and the methods available for DNA extraction. They can also be used to introduce foreign DNA, including viral genomes, into host cells for various applications, such as gene cloning and vaccine development.

3. **Evaluating the Truth of Assertion and Reason**:
- Both the assertion and the reason are true. Plasmids are indeed used as vehicles for DNA transfer, and their properties allow for the easy isolation and introduction of other genetic material, including viral genomes.

4. **Determining the Relationship Between Assertion and Reason**:
- The reason provided explains why plasmids are used as vehicle DNA. The ease of isolation and introduction of viral genomes is a key factor that makes plasmids suitable for this purpose.

5. **Conclusion**:
- Since both the assertion and reason are true, and the reason correctly explains the assertion, the correct option is: "Both Assertion and Reason are true, and Reason is the correct explanation of Assertion."

### Final Answer:
The correct option is: **If both Assertion and Reason are true and Reason is the correct explanation of Assertion.**

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