Assertion. Plants also have hormones called phytohormones. Reason. They increase the rate of reactions and thus always accelerate growth and other related changes

Options

A. Point out if both are true with reason being correct explanation
B. both true but reason not correct explanation
C. assertion true but reason wrong
D. and both wrong.

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "Plants also have hormones called phytohormones."
- **Explanation**: Phytohormones are indeed plant hormones that play a crucial role in regulating various growth processes in plants. This statement is true.

2. **Understanding the Reason**: The reason provided is "They increase the rate of reactions and thus always accelerate growth and other related changes."
- **Explanation**: While it is true that phytohormones can increase the rate of certain reactions in plants, the statement that they "always accelerate growth" is misleading. Some phytohormones can inhibit growth as well.

3. **Analyzing the Relationship**: We need to determine if the reason accurately explains the assertion.
- **Explanation**: The reason does not accurately explain the assertion because not all phytohormones promote growth; some can inhibit it. Therefore, the reason is not a correct explanation for the assertion.

4. **Conclusion**: Based on the analysis:
- The assertion is true: Plants do have hormones called phytohormones.
- The reason is false: Phytohormones do not always accelerate growth; some can inhibit it.

5. **Final Answer**: The correct answer is that the assertion is true, but the reason is false.