How many pairs of cranial nerves am purely sensory :

Options

A. Two
B. Three
C. Four
D. Five

Answer

To determine how many pairs of cranial nerves are purely sensory, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Cranial Nerves**: There are a total of 12 pairs of cranial nerves in the human body. These nerves can be classified into two main types: sensory and motor nerves.

2. **Identify Sensory Nerves**: Sensory nerves are responsible for carrying sensory information from the sense organs to the central nervous system.

3. **Count the Sensory Nerves**: Out of the 12 cranial nerves, we need to identify which ones are purely sensory.

4. **List the Sensory Cranial Nerves**:
- **Olfactory Nerve (Cranial Nerve I)**: Responsible for the sense of smell.
- **Optic Nerve (Cranial Nerve II)**: Responsible for vision.
- **Vestibulocochlear Nerve (Cranial Nerve VIII)**: Responsible for hearing and balance.

5. **Conclusion**: By counting these, we find that there are 3 cranial nerves that are purely sensory.

### Final Answer:
There are **3 pairs of cranial nerves** that are purely sensory.

---