In frog and other anuran,the caudal vertebrae are fused to form:

Options

A. Coccyx
B. Phagostyle
C. Urostyle
D. Prehensile tail

Answer

To answer the question, "In frog and other anuran, the caudal vertebrae are fused to form:", we will analyze the options provided and identify the correct one.

### Step-by-Step Solution:

1. **Understand the Question**: The question asks about the structure formed by the fusion of caudal vertebrae in frogs and other anurans (which are amphibians that include frogs and toads).

2. **Evaluate the Options**:
- **Option A: Caucasus**: This is incorrect. The caucasus refers to a structure made up of 3 to 5 fused vertebrae, but it is not relevant to frogs.

- **Option B: Phagostyle**: This option is also incorrect. The phagostyle is a triangular plate formed by the fusion of caudal vertebrae, but it is primarily associated with birds to support tail feathers, not frogs.

- **Option C: Eurostyle**: This option is correct. The eurostyle is indeed formed by the fusion of caudal vertebrae in frogs and other anurans.

- **Option D: Prehensile tail**: This option is incorrect. A prehensile tail is found in animals like monkeys, which helps them grasp and climb, but it does not pertain to frogs.

3. **Conclusion**: Based on the evaluation of the options, the correct answer is **Option C: Eurostyle**.

### Final Answer:
In frog and other anuran, the caudal vertebrae are fused to form **Eurostyle**.

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