The only cranial nerve which does not supply the cranial region but to visceral region is

Options

A. (a) Vagus
B. (b) Abducens
C. (c) Trigeminal
D. (d) Hypoglossal

Answer

**Step-by-Step Solution:**

1. **Understanding Cranial Nerves**:
- There are 12 pairs of cranial nerves that primarily serve the head and neck regions. However, one of them extends beyond this area.

2. **Identifying the Vagus Nerve**:
- The vagus nerve is the 10th cranial nerve. It is unique among the cranial nerves because it extends from the brain to the abdomen, supplying various visceral organs.

3. **Functions of the Vagus Nerve**:
- The vagus nerve controls functions of internal organs such as the heart, lungs, stomach, and kidneys. It plays a crucial role in the autonomic nervous system, particularly in regulating heart rate, digestion, and respiratory rate.

4. **Analyzing Other Options**:
- Option B: Abducens (6th cranial nerve) - Controls eye movement and does not extend to the visceral region.
- Option C: Trigeminal (5th cranial nerve) - Responsible for facial sensation and chewing, also does not extend to the visceral region.
- Option D: Hypoglossal (12th cranial nerve) - Controls tongue movement and is limited to the cranial region.

5. **Conclusion**:
- After analyzing all the options, it is clear that the vagus nerve is the only cranial nerve that supplies the visceral region, making it the correct answer.

**Final Answer**: The only cranial nerve which does not supply the cranial region but to the visceral region is the **Vagus Nerve**.

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