Which one of the following statement is true for cockroach ?

Options

A. The number of ovarioles in each ovary are ten
B. The larval stage is called caterpillar
C. Anal styles are absent in females
D. They are ureotelic

Explanation

To determine which statement is true for cockroaches, we need to analyze each of the provided statements carefully.

### Step-by-Step Solution:

1. **Understand the Statements**: We are given four statements about cockroaches, and we need to identify which one is true.

2. **Evaluate Statement 1**:
- The first statement claims that there are 10 ovarioles in each ovary of a cockroach.
- **Fact Check**: In cockroaches, there are actually 8 ovarioles in each ovary.
- **Conclusion**: This statement is false.

3. **Evaluate Statement 2**:
- The second statement suggests that the larval stage of a cockroach is called a caterpillar.
- **Fact Check**: The larval stage of a cockroach is known as a nymph, not a caterpillar.
- **Conclusion**: This statement is also false.

4. **Evaluate Statement 3**:
- The third statement mentions that annel styles are absent in females.
- **Fact Check**: Annel styles are indeed paired, unjointed outgrowths that are present only in male cockroaches, projecting backward from the sides of the 9th sternum. They are absent in females.
- **Conclusion**: This statement is true.

5. **Evaluate Statement 4**:
- The fourth statement claims that cockroaches are ureotelic.
- **Fact Check**: Cockroaches are uricotelic, meaning they excrete uric acid as their nitrogenous waste, not urea.
- **Conclusion**: This statement is false.

6. **Final Conclusion**:
- After evaluating all four statements, the only true statement regarding cockroaches is that annel styles are absent in females.

### Answer:
The correct statement is: **C. Annel styles are absent in females.**