Which of the following vertebra is amphicoelous type in frog?
(a) 3rd
(b) 9th
(c) 8th
(d) 10th

Options

A. 3rd
B. 9th
C. 8th
D. 10th

Answer

To determine which vertebra is amphicoelous in frogs, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Term "Amphicoelous":**
- Amphicoelous vertebrae have a central part that is concave on both the anterior (front) and posterior (back) sides. This allows for a greater range of motion between vertebrae.

2. **Identify the Types of Vertebrae in Frogs:**
- Amphicoelous vertebrae are commonly found in amphibians like frogs and also in some fishes.

3. **Analyze the Given Options:**
- The options provided are:
- (a) 3rd
- (b) 9th
- (c) 8th
- (d) 10th

4. **Recall the Structure of Frog Vertebrae:**
- In frogs, the vertebral column consists of several vertebrae, and it is known that the 3rd vertebra is amphicoelous.

5. **Select the Correct Option:**
- Based on the understanding that the 3rd vertebra is amphicoelous, we can conclude that the correct answer is:
- **(a) 3rd**

### Final Answer:
The amphicoelous type of vertebra in frogs is the **3rd vertebra**.

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