Saddle joint occurs between

Options

A. carpal and first metacarpal
B. femur and pelvic girdle
C. all the vertebrae
D. phalanges

Answer

**Step-by-Step Solution:**

1. **Understanding Saddle Joints**: A saddle joint is a type of synovial joint that allows for a wide range of movement. It is characterized by two articulating surfaces that are shaped like a saddle, allowing for movement in multiple directions.

2. **Identifying the Options**: The question provides four options:
- A) Carpal and first metacarpal
- B) Femur and pelvic girdle
- C) All the vertebrae
- D) Phalanges

3. **Analyzing Each Option**:
- **Option A (Carpal and first metacarpal)**: This joint is indeed a saddle joint. It is located at the base of the thumb (the carpometacarpal joint), allowing for opposition and a wide range of thumb movements.
- **Option B (Femur and pelvic girdle)**: This forms the hip joint, which is a ball-and-socket joint, not a saddle joint.
- **Option C (All the vertebrae)**: The joints between vertebrae are cartilaginous joints, which are slightly movable, not saddle joints.
- **Option D (Phalanges)**: The joints between phalanges are hinge joints, allowing for flexion and extension, not saddle joints.

4. **Conclusion**: Based on the analysis, the correct answer is **Option A: Carpal and first metacarpal**. This is the only option that describes a saddle joint.

**Final Answer**: The saddle joint occurs between the carpal and first metacarpal.

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