Which one of the following snakes has vestigial pelvic girdle?

Options

A. Bungarus
B. Eryx
C. Natrix
D. Python

Answer

To answer the question "Which one of the following snakes has vestigial pelvic girdle?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Term "Vestigial Pelvic Girdle":**
- The pelvic girdle, also known as the hip joint, connects the hind limbs in vertebrates. In some species, this structure is reduced or non-functional, which is referred to as "vestigial."

2. **Identifying Snakes with Vestigial Structures:**
- Not all snakes possess a pelvic girdle, as they have evolved to lose their limbs for locomotion. However, some snakes retain remnants of these structures.

3. **Recognizing the Python:**
- Among the various types of snakes, the python is known to have a vestigial pelvic girdle. This means that while pythons do not use limbs for movement, they still possess remnants of the pelvic girdle.

4. **Eliminating Other Options:**
- Other snakes listed in the options (like Eryx and Netrix) do not have a vestigial pelvic girdle. Therefore, they can be eliminated as possible answers.

5. **Conclusion:**
- Based on the above points, the correct answer to the question is **Python** (option 4).

### Final Answer:
**Python** is the snake that has a vestigial pelvic girdle.

---