The only movable bone in the skull is

Options

A. mandible
B. maxilla
C. ethmoid
D. none of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the only movable bone in the skull. We need to identify which bone among the given options is movable.

2. **Identifying the Options**: The options provided are:
- A) Mandible
- B) Maxilla
- C) Ethmoid
- D) None of these

3. **Analyzing Each Option**:
- **Mandible**: This is the lower jawbone and is known to be the only movable bone in the skull. It forms the temporomandibular joint with the temporal bone.
- **Maxilla**: This is the upper jawbone and is fixed; it does not move.
- **Ethmoid**: This is a bone located between the eyes and is also fixed; it does not move.
- **None of these**: This option implies that none of the above bones are movable, which is incorrect because the mandible is movable.

4. **Conclusion**: Since the mandible is the only bone that can move in the skull, the correct answer is option A) Mandible.

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

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