Which of the following has more number of joints?

Options

A. Pectoral girdle
B. Pelvic girdle
C. Mandible
D. Cranium

Answer

To determine which of the given options has more joints, we will analyze each option step by step.

### Step 1: Analyze the Pectoral Girdle
- The pectoral girdle consists of **four joints**:
1. Sternoclavicular joint (SC)
2. Acromioclavicular joint (AC)
3. Scapulothoracic joint
4. Glenohumeral joint

### Step 2: Analyze the Pelvic Girdle
- The pelvic girdle consists of **three joints**:
1. Sacroiliac joint (two of these, one on each side)
2. Pubic symphysis (which connects the two sides)

### Step 3: Analyze the Mandible
- The mandible consists of **two joints**:
1. Temporomandibular joint (TMJ) on each side of the jaw

### Step 4: Analyze the Cranium
- The cranium consists of **one joint**:
- The only joint present is the sutures that connect the different bones of the skull, but these are immovable joints.

### Conclusion
After analyzing all the options:
- Pectoral girdle: 4 joints
- Pelvic girdle: 3 joints
- Mandible: 2 joints
- Cranium: 1 joint

The option with the most joints is the **pectoral girdle** with **four joints**.

### Final Answer
The option with the most number of joints is the **pectoral girdle**.

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