Assertion : the technique of micropropagation has been used to introduce variations in the offspring
Reason: It is not possible to generate virus free plants by micropropagation

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

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that the technique of micropropagation has been used to introduce variations in the offspring.
- **Evaluation**: Micropropagation is primarily used for the rapid propagation of plants, not specifically to introduce variations. It typically produces clones of the parent plant, which means the offspring are genetically identical to the parent.

2. **Understanding the Reason**: The reason provided is that it is not possible to generate virus-free plants by micropropagation.
- **Evaluation**: This statement is incorrect. In fact, micropropagation is often used to produce virus-free plants. This is achieved by using meristematic tissues, which are typically free of viruses.

3. **Conclusion**: Since the assertion is false (micropropagation does not introduce variations) and the reason is also false (it is possible to generate virus-free plants through micropropagation), we conclude that both the assertion and the reason are incorrect.

4. **Final Answer**: Both the assertion and the reason are false.