Number of vertebrae in axial skeletal of frog urostyle is
(a) 10
(b) 12
(c) 15
(d) 9

Options

A. 10
B. 12
C. 15
D. 9

Answer

To determine the number of vertebrae in the axial skeleton of a frog's urostyle, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Urostyle**: The urostyle is a specific structure found in frogs. It is a long, unsegmented bone that is formed from fused vertebrae.

2. **Identify the Role of Urostyle**: The urostyle represents the posterior part of the vertebral column in frogs. It plays a crucial role in supporting the body and aiding in locomotion.

3. **Count the Fused Vertebrae**: The urostyle is composed of a certain number of fused vertebrae. In frogs, this number is specifically known to be nine.

4. **Select the Correct Option**: Given the options:
- (a) 10
- (b) 12
- (c) 15
- (d) 9

Since we established that the number of fused vertebrae in the urostyle is nine, the correct answer is option (d) 9.

### Final Answer:
The number of vertebrae in the axial skeleton of a frog's urostyle is **9** (option d).

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