Assertion: When terminal bud is removed, lateral branches sprout out.
Reason: In terminal bud, auxins in higher concentration checks the growth of next axial buds.

Options

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

Answer

To solve the question regarding the assertion and reason, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that when the terminal bud is removed, lateral branches sprout out. This is a true statement. When the apical (or terminal) bud is removed, it allows the lateral buds to grow, which is a common observation in plant growth.

**Hint**: Think about what happens to plant growth when the main growing point is removed.

2. **Understanding the Reason**:
- The reason provided states that in the terminal bud, auxins are present in higher concentrations, which checks the growth of the next axial buds. This is also true. Auxins are plant hormones that promote apical dominance, meaning they inhibit the growth of lateral buds when the terminal bud is intact.

**Hint**: Consider the role of auxins in regulating plant growth and how they influence the dominance of the terminal bud.

3. **Connecting Assertion and Reason**:
- Since both the assertion and the reason are true, we need to determine if the reason correctly explains the assertion. The reason explains that the presence of auxins in the terminal bud inhibits the growth of lateral buds, and when the terminal bud is removed, this inhibition is lifted, allowing lateral buds to grow.

**Hint**: Reflect on how the reason logically supports the assertion.

4. **Evaluating the Options**:
- Based on the analysis:
- Both the assertion and reason are true.
- The reason correctly explains the assertion.
- Therefore, the correct option is that both assertion and reason are true, and the reason is the correct explanation of the assertion.

**Hint**: Review the options carefully to select the one that matches your conclusion.

### Final Conclusion:
The correct answer is that both the assertion and reason are true, and the reason is the correct explanation of the assertion.