Socket in pelvic girdle in which head of femur articulates is formed by fusion of

Options

A. Ischium and pubis
B. Ilium and pubis
C. Ilium and ischium
D. Ileum, ischium and pubis.

Answer

To answer the question regarding the socket in the pelvic girdle where the head of the femur articulates, we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Components of the Pelvic Girdle**:
The pelvic girdle is made up of paired hip bones. Each hip bone is formed by the fusion of three distinct bones.

2. **List the Three Bones**:
The three bones that make up each hip bone are:
- Ilium
- Ischium
- Pubis

3. **Understand the Function of These Bones**:
These three bones come together to form a structure known as the acetabulum, which is the socket in the pelvic girdle.

4. **Define the Acetabulum**:
The acetabulum is a cup-shaped socket that articulates with the head of the femur, forming the hip joint.

5. **Identify the Type of Joint**:
The joint formed at the acetabulum is known as a ball-and-socket joint, where the rounded head of the femur fits into the acetabulum.

6. **Select the Correct Option**:
The question asks which bones fuse to form the acetabulum. The correct answer is that it is formed by the fusion of the ilium, ischium, and pubis.

### Conclusion:
The socket in the pelvic girdle in which the head of the femur articulates is formed by the fusion of the ilium, ischium, and pubis.

**Correct Answer: Option D - Ilium, Ischium, and Pubis.**

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