Coccygeal bone occurs in

Options

A. (a) Skull
B. (b) pectoral girdle
C. (c) Vertebra column
D. (d) Pelvic girdle

Answer

**Step-by-Step Solution:**

1. **Identify the Coccygeal Bone**: The coccygeal bone, commonly referred to as the coccyx, is a small, triangular bone located at the base of the vertebral column.

2. **Understand its Classification**: The coccyx is classified as part of the vertebral column. The vertebral column is made up of 33 vertebrae, which are categorized into different regions.

3. **List the Regions of the Vertebral Column**:
- **Cervical Region**: Comprises 7 vertebrae located in the neck.
- **Thoracic Region**: Comprises 12 vertebrae located in the upper back, behind the rib cage.
- **Lumbar Region**: Comprises 5 vertebrae located in the lower back (abdominal region).
- **Sacral Region**: Comprises 5 fused vertebrae forming the sacrum.
- **Coccygeal Region**: Comprises 4 to 5 fused vertebrae forming the coccyx.

4. **Understand the Evolutionary Aspect**: The coccyx is considered a vestigial structure, meaning it is a remnant of a tail from our evolutionary ancestors. In modern humans, it serves no significant function.

5. **Conclude the Answer**: Since the coccygeal bone is part of the vertebral column, the correct answer to the question is that the coccygeal bone occurs in the vertebral column.

**Final Answer**: The coccygeal bone occurs in the vertebral column.

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