Number of cranial nerve in human is -

Options

A. Ten only
B. Ten pairs
C. Twenty pairs
D. Twelve pairs

Answer

### Step-by-Step Solution:

1. **Understanding Cranial Nerves**: Cranial nerves are nerves that emerge directly from the brain, including the brainstem, and are responsible for various sensory and motor functions.

2. **Counting the Cranial Nerves**: In humans, there are a total of 12 pairs of cranial nerves. This means that for each cranial nerve, there is a corresponding nerve on the opposite side of the body.

3. **Listing the Cranial Nerves**: The 12 pairs of cranial nerves are:
- Olfactory (I)
- Optic (II)
- Oculomotor (III)
- Trochlear (IV)
- Trigeminal (V)
- Abducens (VI)
- Facial (VII)
- Vestibulocochlear (VIII)
- Glossopharyngeal (IX)
- Vagus (X)
- Accessory (XI)
- Hypoglossal (XII)

4. **Conclusion**: Since the question asks for the number of cranial nerves in humans, the answer is 12 pairs of cranial nerves.

5. **Final Answer**: Therefore, the correct answer to the question is 12 pairs.