Assertion : Cockroach is unisexual and shows sexual dimorphism.
Reason: Male cockroach has only anal cerci while female cockroach has anal styles as well.

Options

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

Answer

To solve the question, we will analyze the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Cockroach is unisexual and shows sexual dimorphism."
- This means that cockroaches have distinct male and female sexes, and there are observable differences between them.

2. **Evaluating the Assertion**:
- Cockroaches belong to the phylum Arthropoda and are indeed unisexual, meaning they have separate male and female individuals.
- Sexual dimorphism is also present in cockroaches, as male and female cockroaches exhibit different physical characteristics.

3. **Understanding the Reason**:
- The reason provided states that "Male cockroach has only anal cerci while female cockroach has anal styles as well."
- This statement is intended to explain the differences between male and female cockroaches.

4. **Evaluating the Reason**:
- The statement in the reason is incorrect. Male cockroaches have anal cerci, while female cockroaches have anal styles.
- The anal cerci in males are used for copulation, while the anal styles in females serve different functions.

5. **Conclusion**:
- Since the assertion is true and the reason is false, the correct answer is that the assertion is true but the reason is false.

### Final Answer:
The correct option is: **Assertion is true but Reason is false.**

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