Which is correct about pons varolii ?

Options

A. Situated between midbrain & M.O.
B. Pons contains pneumotaxic centre
C. Inner gray, outer white matter
D. All of the above

Answer

### Step-by-Step Solution:

1. **Understanding Pons Varolii**:
- Pons Varolii, commonly referred to as the Pons, is a significant structure in the brain. It is part of the hindbrain and plays a crucial role in the central nervous system.

2. **Location**:
- The Pons is situated between the medulla oblongata and the midbrain. This anatomical positioning is essential for its function in the brainstem.

3. **Function**:
- One of the primary functions of the Pons is to regulate the pneumotoxic center, which is involved in controlling breathing. It also plays a role in regulating sleep and other autonomic functions.

4. **Structure**:
- The Pons consists of gray matter on the inside and white matter on the outside. This structural arrangement is typical of many parts of the brain and is important for its function.

5. **Conclusion**:
- Based on the information gathered, we can conclude that all the statements regarding Pons Varolii are correct. It is located between the medulla oblongata and midbrain, regulates the pneumotoxic center, and has a structure consisting of gray matter inside and white matter outside.

6. **Final Answer**:
- Therefore, the correct answer to the question "Which is correct about Pons Varolii?" is that all the mentioned statements about it are accurate.