Which of the following cranial nerves is present in rabbit but absent in frog?

Options

A. Glossopharyngeal
B. Hypoglossal
C. Olfactory
D. Optic

Answer

To determine which cranial nerve is present in rabbits but absent in frogs, we can analyze the options provided:

1. **Glossopharyngeal Nerve**: This is the 9th cranial nerve, responsible for swallowing and is present in both rabbits and frogs. Therefore, it cannot be the answer.

2. **Hypoglossal Nerve**: This is the 12th cranial nerve, which controls the movement of the tongue. It is present in rabbits but absent in frogs. This suggests that this could be the correct answer.

3. **Olfactory Nerve**: This is the 1st cranial nerve, responsible for the sense of smell. It is present in both rabbits and frogs, so this option is also incorrect.

4. **Optic Nerve**: This is the 2nd cranial nerve, which is responsible for vision. It is also present in both rabbits and frogs, making this option incorrect as well.

Based on the analysis, the cranial nerve that is present in rabbits but absent in frogs is the **Hypoglossal Nerve**.

**Final Answer**: Hypoglossal Nerve (12th cranial nerve)

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