Select the INCORRECT match.

Options

A. Clavicle - S-shaped collar bone having flat medial part and cylindrical outer parts.
B. Scapula -a large triangular bone situated dorsolaterally over `2^(nd) " to" 7^(th)` rib.
C. Acetabulum - a cavity formed by the fusion of illum, ischium and pubis.
D. Partella - cup shaped sesamoid bone making knee joint

Answer

To solve the question of selecting the INCORRECT match, we will analyze each of the four statements provided regarding anatomical structures.

### Step-by-Step Solution:

1. **Analyze the First Statement: Clavicle**
- The statement claims that the clavicle is an S-shaped collar bone having a flat medial part and a cylindrical outer part.
- This is true. The clavicle, or collarbone, does have an S-shape and consists of a flat medial end (which articulates with the sternum) and a cylindrical lateral end (which articulates with the scapula).

**Hint:** Remember the shape and structure of the clavicle when considering its description.

2. **Analyze the Second Statement: Scapula**
- The statement claims that the scapula is a large triangular bone situated dorsolaterally over the second and seventh ribs.
- This is also true. The scapula is indeed a large triangular bone located on the dorsal side of the body, and it is positioned between the second and seventh ribs.

**Hint:** Visualize the position of the scapula in relation to the ribs to confirm its location.

3. **Analyze the Third Statement: Acetabulum**
- The statement claims that the acetabulum is a cavity formed by the fusion of the ileum, ischium, and pubis.
- This statement is true. The acetabulum is formed at the junction of these three bones of the pelvis and serves as the socket for the hip joint.

**Hint:** Recall the pelvic anatomy and how the acetabulum is formed from these three bones.

4. **Analyze the Fourth Statement: Patella**
- The statement claims that the patella is a cup-shaped scissor-moid bone making the knee joint.
- This statement is incorrect. While the patella is indeed a cup-shaped bone, it does not directly form the knee joint. The knee joint is primarily formed by the femur and tibia, with the patella acting as a protective structure and improving the leverage of the quadriceps muscle.

**Hint:** Consider the role of the patella in the knee joint and its anatomical relationships with other bones.

### Conclusion:
The incorrect match among the statements is the fourth one regarding the patella. Therefore, the answer is:

**Answer:** 4 (Patella - cup-shaped scissor-moid bone making knee joint is incorrect).