Vertebral coloumn develops from

Options

A. Notochord
B. Nerve cord
C. Mesoderm
D. Endoderm.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the origin of the vertebral column, commonly known as the backbone.

2. **Identifying the Options**: The options given are:
- A. Notochord
- B. Nervochord
- C. Mesoderm
- D. Mesoderm (Note: This option is repeated)

3. **Defining the Vertebral Column**: The vertebral column consists of 26 vertebrae that are arranged serially. It extends from the skull to the trunk and provides structural support.

4. **Role of the Notochord**: The notochord is a flexible, rod-like structure that serves as a precursor to the vertebral column during embryonic development. It is essential in the formation of the vertebrae.

5. **Conclusion**: The vertebral column develops from the notochord, which is option A.

6. **Final Answer**: Therefore, the correct answer is **A. Notochord**.

---