A feature of the vertebra of mammals is

Options

A. Centrum is amphiplatyan
B. Epiphysis is present
C. Inter vertebral disc present between two bones
D. All the above

Answer

To answer the question "A feature of the vertebra of mammals is," we will analyze the provided options step by step.

### Step 1: Understanding the options
The options given are:
1. Centrum is amphiplatian
2. Apiphysis is present
3. Intervertebral disc present between two bones
4. All the above

### Step 2: Analyzing each option

**Option 1: Centrum is amphiplatian**
- The centrum refers to the solid central part of each vertebra. In mammals, the centrum is amphiplatian, meaning it is flat on both sides. This characteristic provides strength to the vertebral column. Therefore, this statement is true.

**Option 2: Apiphysis is present**
- The epiphysis is the cartilaginous layer found at the ends of long bones, which is crucial for growth. In mammals, the presence of epiphysis in vertebrae is also true. Hence, this statement is correct.

**Option 3: Intervertebral disc present between two bones**
- Intervertebral discs are located between adjacent vertebrae in the vertebral column. They allow slight movement and act as shock absorbers for the spine. This feature is indeed present in mammalian vertebrae, making this statement true as well.

### Step 3: Conclusion
Since all three individual statements are true, the correct answer to the question is **"All the above."**

### Final Answer
A feature of the vertebra of mammals is **all the above.**

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