The vagus nerve is the _____ cranial nerve.

Options

A. `7^(th)`
B. `5^(th)`
C. `10^(th)`
D. `9^(th)`

Explanation

To determine which cranial nerve the vagus nerve is, follow these steps:

1. **Identify the Total Number of Cranial Nerves**: Understand that there are a total of 12 pairs of cranial nerves in the human body.

2. **Locate the Vagus Nerve**: Recognize that the vagus nerve is specifically known as the 10th cranial nerve.

3. **Confirm the Answer**: Since the vagus nerve is the 10th cranial nerve, you can conclude that the answer to the question is "10th cranial nerve".

4. **Review Other Cranial Nerves for Context**: For additional context, you can note that:
- The 7th cranial nerve is the facial nerve.
- The 5th cranial nerve is the trigeminal nerve.
- The 9th cranial nerve is the glossopharyngeal nerve.

Thus, the final answer is: The vagus nerve is the **10th cranial nerve**.