Dicondylic skull with 10 pairs of cranial nerves occur in

Options

A. Pisces
B. Amphibia
C. Reptilia
D. Mammalia

Answer

To solve the question regarding which group has a dicondylic skull with 10 pairs of cranial nerves, we can analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Dicondylic Skull**:
- A dicondylic skull refers to a skull that has two occipital condyles, which allows for a greater range of head movement.

2. **Analyzing the Options**:
- **Option A: Pisces** (Fish)
- Fish do have cranial nerves, but they do not possess a dicondylic skull. Instead, they typically have a different skull structure. Therefore, this option is incorrect.

- **Option B: Amphibia** (Amphibians)
- Amphibians are known to have a dicondylic skull and they possess 10 pairs of cranial nerves. This matches the criteria given in the question, making this option correct.

- **Option C: Reptilia** (Reptiles)
- Reptiles have a monocondylic skull, which means they have one occipital condyle. They do not meet the criteria of having a dicondylic skull, so this option is incorrect.

- **Option D: Mammalia** (Mammals)
- Mammals have a dicondylic skull, but they possess 12 pairs of cranial nerves, not 10. Thus, this option does not fulfill the requirements stated in the question, making it incorrect.

3. **Conclusion**:
- After analyzing all the options, the only group that has a dicondylic skull with 10 pairs of cranial nerves is **Amphibia**. Therefore, the correct answer is **Option B: Amphibia**.

### Final Answer:
The correct answer is **Amphibia**.