Cloacal respiration is found in

Options

A. Snakes
B. Lizards
C. Chelonians
D. Alligators

Answer

### Step-by-Step Solution

1. **Understand the Concept of Cloaca**:
- The cloaca is a common opening in certain animals for the digestive, reproductive, and urinary tracts. It serves as a multifunctional orifice where waste and reproductive materials exit the body.

2. **Identify Animals with Cloaca**:
- Cloaca is found in various groups of animals, including amphibians, reptiles, birds, and some mammals. This anatomical feature is crucial for their reproductive and excretory functions.

3. **Define Cloacal Respiration**:
- Cloacal respiration is a specialized form of respiration where certain aquatic animals can extract oxygen from water through their cloaca. This process allows them to breathe underwater.

4. **Identify Which Animals Exhibit Cloacal Respiration**:
- Some species of aquatic turtles (which belong to the order Chelonia) are known to utilize cloacal respiration. They can pump water into their cloacal orifice, allowing for gas exchange through specialized structures.

5. **Conclusion**:
- Given the options (snakes, lizards, clonians, alligators), the correct answer is **clonians**, which refers to turtles and other members of the order Chelonia that exhibit cloacal respiration.

### Final Answer:
Cloacal respiration is found in **clonians** (option C).

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