Which one of the following si a limbless amphibian ?

Options

A. Salmandra (Urodela )
B. Ichthyophis ( Apoda )
C. Necturus ( Urodela )
D. Hyla (Anura )

Answer

To determine which one of the following is a limbless amphibian, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Amphibians**:
Amphibians are vertebrates that can live both on land and in water. They typically have moist skin that allows for respiration.

2. **Identify the Options**:
We need to evaluate the given options to find out which one is a limbless amphibian.

3. **Evaluate Each Option**:
- **Option 1: Salamander** - Salamanders belong to the class Urodela and have limbs. Therefore, this is not a limbless amphibian.
- **Option 2: Ichthyophis** - Ichthyophis is a genus of limbless amphibians found in Southeast Asia. This indicates that it is indeed a limbless amphibian.
- **Option 3: Necturus** - Necturus also belongs to the class Urodela and has limbs. Thus, it is not a limbless amphibian.
- **Option 4: Hyla** - Hyla belongs to the class Anura and has limbs. Therefore, it is also not a limbless amphibian.

4. **Conclusion**:
After evaluating all options, the only limbless amphibian is **Ichthyophis**. Thus, the correct answer is **Option 2: Ichthyophis**.