Assertion :- Plant dies up after removing the bark.
Reason: By the removal of bark from large tree, the tree gradually becomes dry and food conduction stops and ultimately dies.

Options

A. If both Assertion & Reason are True & Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but the Reason is a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are false.

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "the plant dies up after removing the bark." This is a true statement because the bark is essential for the plant's survival.

**Hint**: Consider what the bark does for the plant and why its removal might be detrimental.

2. **Understanding the Reason**: The reason given is that "by the removal of bark from a large tree, the tree gradually becomes dry and food conduction stops and ultimately dies." This statement is also true. The bark contains the phloem, which is responsible for transporting food (sugars) produced by the leaves to the rest of the plant.

**Hint**: Think about the role of phloem and what happens when it is damaged or removed.

3. **Connecting Assertion and Reason**: The reason explains why the assertion is true. When the bark is removed, the phloem is damaged, leading to a cessation of food transport. This ultimately causes the plant to dry out and die.

**Hint**: Reflect on how the removal of the bark directly impacts the plant's ability to transport nutrients.

4. **Conclusion**: Since both the assertion and the reason are true, and the reason correctly explains the assertion, we conclude that the correct answer is that both the assertion and reason are true, and the reason is the correct explanation of the assertion.

**Hint**: Review the definitions of assertion and reason to ensure clarity in your conclusion.

### Final Answer:
Both the assertion and reason are true, and the reason is the correct explanation of the assertion.