Assertion : Grafting is attempted in those plants which show secondary growth.
Reason : Cambium during secondary growth show cell division in both stock and scion.

Options

A. If both Assertion and Reason are the true and Reason is correct explanation of Assertion .
B. If both Assertion and Reason ar ture but Reason is not 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 Text Solution:**

1. **Understanding the Assertion**: The assertion states that grafting is attempted in plants that show secondary growth. Grafting is a horticultural technique where parts of two plants are joined together to grow as one. This technique is commonly used in plants that exhibit secondary growth, which is characterized by an increase in the thickness of stems and roots.

2. **Defining Secondary Growth**: Secondary growth occurs due to the activity of the cambium, which is a type of lateral meristem. This growth results in the thickening of the plant's stems and roots, allowing for greater support and nutrient transport. It is primarily observed in dicotyledonous plants.

3. **Understanding the Reason**: The reason provided states that during secondary growth, the cambium shows cell division in both the stock (the plant that provides the root system) and the scion (the part that is grafted onto the stock). This statement is accurate because the cambium is responsible for producing new cells that contribute to the thickening of the plant.

4. **Evaluating the Relationship**: Since the assertion is true (grafting is indeed performed on plants that exhibit secondary growth) and the reason is also true (cambium does show cell division in both stock and scion during secondary growth), we need to determine if the reason correctly explains the assertion.

5. **Conclusion**: The reason does explain the assertion because the ability to perform grafting effectively relies on the presence of active cambium in both the stock and scion, which allows for successful integration and growth of the grafted parts. Therefore, both the assertion and reason are true, and the reason is the correct explanation of the assertion.

6. **Final Answer**: The correct option is that both the assertion and reason are true, and the reason is the correct explanation of the assertion.

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