Intervertbral disc is found in the vertebral column of

Options

A. (a) Birds
B. (b) Reptiles
C. (c) Mammals
D. (d) Amphibians

Answer

### Step-by-Step Solution:

1. **Understanding Intervertebral Discs**: Intervertebral discs are structures found in the vertebral column. They are composed of soft, cartilage-like tissue that acts as cushions between the vertebrae.

2. **Function of Intervertebral Discs**: These discs serve several important functions:
- They act as shock absorbers, protecting the vertebrae from mechanical damage.
- They provide cushioning, which helps in the flexibility and movement of the spine.
- They also protect the spinal cord and spinal nerves that run through the vertebral column.

3. **Location of Intervertebral Discs**: Intervertebral discs are located between each vertebra in the spinal column. This means they are present in the vertebral columns of organisms that have a well-defined spine.

4. **Identifying the Class of Organisms**: To determine where intervertebral discs are found, we need to identify the classes of vertebrates:
- **Birds**: They belong to the class Aves and do not possess intervertebral discs.
- **Reptiles**: They belong to the class Reptilia and also lack intervertebral discs.
- **Mammals**: They belong to the class Mammalia, which includes humans and other advanced vertebrates. Mammals have intervertebral discs in their vertebral column.
- **Amphibians**: They belong to the class Amphibia and do not have intervertebral discs.

5. **Conclusion**: Based on the information above, the correct answer to the question is that intervertebral discs are found in the vertebral column of **mammals**.

### Final Answer:
Intervertebral discs are found in the vertebral column of **mammals**.

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