The movable skull bone is

Options

A. Maxilla
B. Vomer
C. Mandible
D. All the above.

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks which skull bone is movable among the options provided: maxilla, vomer, mandible, and all of the above.

2. **Understand Skull Bones**: The skull consists of cranial bones and facial bones. Most cranial bones are immovable, and while many facial bones are also immovable, there is an exception.

3. **Analyze Each Option**:
- **Maxilla**: This bone forms the upper jaw and is immovable. Therefore, it cannot be the correct answer.
- **Vomer**: This is an unpaired facial bone that separates the right and left nasal cavities. It is also immovable, making it an incorrect option.
- **Mandible**: This bone forms the lower jaw and is the only movable bone in the skull. It allows for the opening and closing of the mouth, which is essential for chewing and speaking.

4. **Conclusion**: Since the mandible is the only movable skull bone, the correct answer is **mandible**.

5. **Final Answer**: The movable skull bone is **mandible**.

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