V cranial nerve of frog is

Options

A. facial
B. olfactory
C. trigeminal
D. vagus

Answer

To determine the 5th cranial nerve of a frog, we can analyze the options provided:

1. **Identify the Options**: The options given are:
- A) Facial
- B) Olfactory
- C) Trigeminal
- D) Vagus

2. **Evaluate Option A (Facial Nerve)**:
- The facial nerve is known to be the 7th cranial nerve in frogs.
- Therefore, this option is incorrect.

3. **Evaluate Option B (Olfactory Nerve)**:
- The olfactory nerve is the 1st cranial nerve and is responsible for the sense of smell.
- Since it is not the 5th cranial nerve, this option is also incorrect.

4. **Evaluate Option C (Trigeminal Nerve)**:
- The trigeminal nerve is recognized as the 5th cranial nerve in frogs.
- It arises from the lateral side of the medulla oblongata, confirming that this option is correct.

5. **Evaluate Option D (Vagus Nerve)**:
- The vagus nerve is the 10th cranial nerve and is involved in regulating the respiration rate.
- Since it is not the 5th cranial nerve, this option is incorrect.

6. **Conclusion**:
- After evaluating all options, the correct answer is **C) Trigeminal**, as it is the 5th cranial nerve of the frog.