The smallest cranial nerve in human being is

Options

A. Trigemminal
B. Abducens
C. Opthalmic
D. Trochlear

Answer

**Step-by-Step Solution:**

1. **Identify the Options**: The question provides four options: Trigeminal, Abducens, Ophthalmic, and Trochlear.

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

3. **Determine the Size of Cranial Nerves**: Among the cranial nerves, the size can be determined by the number of axons they contain or their overall dimensions.

4. **Identify the Smallest Cranial Nerve**: The Trochlear nerve (Cranial Nerve IV) is known to be the smallest cranial nerve in terms of the number of axons.

5. **Additional Characteristics**: The Trochlear nerve has the longest intracranial course and is unique as it is the only cranial nerve that emerges from the dorsal part of the brainstem.

6. **Conclusion**: Based on the information, the smallest cranial nerve in human beings is the **Trochlear nerve**.

**Final Answer**: The smallest cranial nerve in human beings is the **Trochlear nerve**.

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