Each coxal bone is formed by fusion of three bones ?

Options

A. ilium ,ischium , pubis
B. ilium , sacrum, pubis
C. ilium , sacrum , coccyx
D. ilium sacrum, ischium

Answer

To answer the question regarding the formation of each coxal bone by the fusion of three bones, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Coxal Bone**:
- The coxal bone, also known as the hip bone, is a crucial component of the pelvic girdle. It is important to identify the bones that contribute to its formation.

2. **Identifying the Bones**:
- The coxal bone is formed by the fusion of three specific bones. These are:
- **Ilium**: This is the largest part of the coxal bone and is located at the uppermost region.
- **Ischium**: This bone forms the lower part of the coxal bone and is responsible for the structure of the hip.
- **Pubis**: This is the front portion of the coxal bone and connects with the other pubis from the opposite side.

3. **Confirming the Fusion**:
- The ilium, ischium, and pubis fuse together to form a single coxal bone. This fusion occurs during development and is crucial for the stability and function of the pelvic girdle.

4. **Eliminating Incorrect Options**:
- When presented with options, we can eliminate those that include bones not part of the coxal bone formation:
- Options that include **sacrum** or **coccyx** are incorrect as these bones do not contribute to the formation of the coxal bone.

5. **Conclusion**:
- The correct combination of bones that form the coxal bone is **ilium, ischium, and pubis**.

### Final Answer:
The coxal bone is formed by the fusion of the **ilium, ischium, and pubis**.

---