In humans, coccyx is formed by the fusion of vertebrae`:`

Options

A. 3
B. 4
C. 5
D. 6

Answer

To answer the question about how many vertebrae fuse to form the coccyx in humans, we can break down the information step by step.

### Step-by-Step Solution:

1. **Understanding Coccyx**: The coccyx, commonly known as the tailbone, is located at the base of the vertebral column. It is an important structure that provides support when sitting.

2. **Vertebral Structure**: The human vertebral column consists of several sections: cervical, thoracic, lumbar, sacral, and coccygeal. The coccyx is part of the coccygeal section.

3. **Coccyx Composition**: The coccyx is formed by the fusion of several small vertebrae. In humans, it typically consists of 3 to 5 rudimentary vertebrae.

4. **Fusion of Vertebrae**: These coccygeal vertebrae are fused together to form a single structure known as the coccyx. The exact number of fused vertebrae can vary among individuals, but it is commonly accepted that there are 4 vertebrae that fuse to form the coccyx.

5. **Conclusion**: Therefore, the coccyx in humans is primarily formed by the fusion of 4 vertebrae.

### Final Answer:
The coccyx in humans is formed by the fusion of **4 vertebrae**.

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