Coccygeal bone occurs in

Options

A. Skull
B. Pectoral girdle
C. Vertebral column
D. Pelvic girdle.

Answer

### Step-by-Step Solution:

1. **Understanding Coccygeal Bone**: The coccygeal bone, also known as the coccyx, is the last bone in the human vertebral column. It is formed by the fusion of several smaller bones.

2. **Vertebral Column Composition**: The human vertebral column is made up of 26 vertebrae. These are categorized into different regions:
- **Cervical Region**: Contains 7 vertebrae.
- **Thoracic Region**: Contains 12 vertebrae.
- **Lumbar Region**: Contains 5 vertebrae.
- **Sacral Region**: Comprises 5 fused vertebrae that form the sacrum.
- **Coccygeal Region**: The coccyx is formed by the fusion of 3 to 5 vertebrae.

3. **Identifying the Correct Option**: The question asks where the coccygeal bone occurs. The options provided are:
- Skull
- Pectoral girdle
- Vertebral column
- Pelvic girdle

Since the coccygeal bone is part of the vertebral column, the correct answer is the **vertebral column**.

4. **Eliminating Incorrect Options**:
- **Skull**: The coccygeal bone is not part of the skull.
- **Pectoral Girdle**: The coccygeal bone is not part of the pectoral girdle.
- **Pelvic Girdle**: The coccygeal bone is not part of the pelvic girdle.

5. **Conclusion**: The coccygeal bone occurs in the **vertebral column**.