The eighth cranial nerve is

Options

A. Optic - Sensory nerve
B. Auditory - Motor nerve
C. Optic - Motor nerve
D. Auditory - Sensory nerve

Answer

To solve the question regarding the eighth cranial nerve, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Cranial Nerves**:
- There are 12 pairs of cranial nerves in the human body, each with specific functions.

2. **Locate the Eighth Cranial Nerve**:
- The eighth cranial nerve is known as the vestibulocochlear nerve.

3. **Understand the Function of the Eighth Cranial Nerve**:
- The vestibulocochlear nerve is primarily responsible for sensory functions, specifically related to hearing and balance.

4. **Differentiate Between Sensory and Motor Nerves**:
- Cranial nerves can be classified as sensory, motor, or mixed. The vestibulocochlear nerve is purely sensory.

5. **Analyze the Options Provided**:
- The options given are:
- A) Optic sensory nerve
- B) Auditory motor nerve
- C) Optic motor nerve
- D) Auditory sensory nerve
- The optic nerve (second cranial nerve) is a sensory nerve but not the eighth. The auditory motor nerve is incorrect because the vestibulocochlear nerve is not motor. The optic motor nerve is also incorrect. The correct option is D) Auditory sensory nerve, as it accurately describes the vestibulocochlear nerve.

6. **Conclusion**:
- Therefore, the eighth cranial nerve is best described as the auditory sensory nerve.

### Final Answer:
The eighth cranial nerve is the **auditory sensory nerve**.

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