Which of the following is/are not correctly matched pairs?
(i) Ball and socket joint -Between humerus and pectoral girdle
(ii) Pivot joint - Between carpal and metacarpal
(iii) Saddle joint - Between atlas and axis
(iv) Gliding joint - Between the carpals
(v) Fibrous joint - In flat skull bones

Options

A. (ii) and (iii)
B. (i) and (iv)
C. (v) only
D. (ii) only

Explanation

To determine which pairs are not correctly matched, we need to analyze each given joint type and its corresponding example.

### Step-by-Step Solution:

1. **Analyze Ball and Socket Joint**:
- **Definition**: A ball and socket joint allows for a wide range of movement in multiple directions.
- **Example**: Between the humerus and pectoral girdle (shoulder joint).
- **Conclusion**: This pair is correctly matched.

2. **Analyze Pivot Joint**:
- **Definition**: A pivot joint allows for rotational movement.
- **Example**: Between carpal and metacarpal.
- **Conclusion**: This pair is incorrectly matched. The correct example should be between the atlas and axis vertebrae.

3. **Analyze Saddle Joint**:
- **Definition**: A saddle joint allows for movement back and forth and side to side.
- **Example**: Between atlas and axis.
- **Conclusion**: This pair is incorrectly matched. The correct example should be between the carpal and metacarpal of the thumb.

4. **Analyze Gliding Joint**:
- **Definition**: A gliding joint allows for sliding movements.
- **Example**: Between the carpals.
- **Conclusion**: This pair is correctly matched.

5. **Analyze Fibrous Joint**:
- **Definition**: A fibrous joint is an immovable joint where bones are connected by fibrous connective tissue.
- **Example**: In flat skull bones.
- **Conclusion**: This pair is correctly matched.

### Summary of Incorrectly Matched Pairs:
- The incorrectly matched pairs are:
- (ii) Pivot joint - Between carpal and metacarpal (should be between atlas and axis).
- (iii) Saddle joint - Between atlas and axis (should be between carpal and metacarpal of the thumb).

### Final Answer:
The incorrectly matched pairs are (ii) and (iii).

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