Which of these is a part of appendicular skeleton?

Options

A. Ribs
B. Cranium
C. Clavicle
D. Vertebrae

Answer

To determine which of the given options is a part of the appendicular skeleton, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Skeleton Structure**: The human skeleton is divided into two main parts: the axial skeleton and the appendicular skeleton. The axial skeleton includes the skull, vertebral column, and rib cage, while the appendicular skeleton consists of the limbs and the girdles (pectoral and pelvic).

2. **Identify the Options**: The question presents several options. We need to evaluate each option to see if it belongs to the appendicular skeleton.

3. **Evaluate Each Option**:
- **Option 1: Ribs**: Ribs are part of the rib cage, which is included in the axial skeleton. Therefore, this option is incorrect.
- **Option 2: Cranium**: The cranium is the skull, which is also part of the axial skeleton. Thus, this option is incorrect as well.
- **Option 3: Clavicle**: The clavicle, or collarbone, is part of the pectoral girdle. Since the pectoral girdle is part of the appendicular skeleton, this option is correct.
- **Option 4: Vertebrae**: The vertebrae form the backbone and are part of the axial skeleton. Therefore, this option is incorrect.

4. **Conclusion**: After evaluating all the options, we find that the clavicle is the only bone listed that is part of the appendicular skeleton.

### Final Answer:
The correct answer is the **clavicle**, as it is part of the appendicular skeleton.

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