With respect to their function identify the odd one from the cranial nerve given below.
(a) Olfactory nerve
(b) Optic nerve
(c) Oculomotor nerve
(d) Vestibulocochlear nerve

Options

A. Olfactory nerve
B. Optic nerve
C. Oculomotor nerve
D. Vestibulocochlear nerve

Answer

To solve the question of identifying the odd cranial nerve based on their functions, we will analyze each of the given options step by step.

### Step 1: Identify the Functions of Each Cranial Nerve

1. **Olfactory Nerve (Option A)**:
- Function: This nerve is responsible for the sense of smell. It is a sensory nerve.

2. **Optic Nerve (Option B)**:
- Function: This nerve is responsible for vision. It transmits visual information from the retina to the brain. It is also a sensory nerve.

3. **Oculomotor Nerve (Option C)**:
- Function: This nerve controls most of the eye's movements, including the constriction of the pupil and maintaining an open eyelid. It is primarily a motor nerve.

4. **Vestibulocochlear Nerve (Option D)**:
- Function: This nerve is responsible for hearing and balance. It is a sensory nerve.

### Step 2: Classify Each Nerve

- **Sensory Nerves**:
- Olfactory Nerve (A) - Smell
- Optic Nerve (B) - Vision
- Vestibulocochlear Nerve (D) - Hearing and Balance

- **Motor Nerves**:
- Oculomotor Nerve (C) - Eye movement

### Step 3: Identify the Odd One Out

From the classification, we can see that:
- Olfactory, Optic, and Vestibulocochlear nerves are all sensory nerves.
- The Oculomotor nerve is a motor nerve.

### Conclusion

The odd one out is **(C) Oculomotor nerve**, as it is the only motor nerve among the options provided, while the others are sensory nerves.

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