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

Options

A. (a) `a-v, b-iv, c-iii, d-ii, e-i`
B. (b) `a-i, b-ii, c-iii, d-v, e-iv`
C. (c) `a-v, b-iii, c-ii, d-i, e-ii`
D. (d) `a-i, b-iii, c-ii, d-v, e-iv`

Answer

To determine which of the given pairs are not correctly matched, we will analyze each joint type and its corresponding location.

### Step-by-Step Solution:

1. **Identify the Joint Types and Their Locations**:
- **Ball and Socket Joint**: This type of joint allows for rotational movement and is typically found between the humerus and the pectoral girdle.
- **Pivot Joint**: This joint allows for rotational movement and is found between the atlas and axis (the first two cervical vertebrae).
- **Saddle Joint**: This joint allows for a wide range of movement and is found between the carpal and metacarpal bones (specifically, the thumb).
- **Gliding Joint**: This joint allows for sliding movements and is found between the carpals (wrist bones).
- **Fibrous Joint**: This joint is immovable and is found in flat skull bones.

2. **Match Each Joint with Its Description**:
- (i) Ball and socket joint - (a) Between humerus and pectoral girdle: **Correctly matched**.
- (ii) Pivot joint - (c) Between atlas and axis: **Correctly matched**.
- (iii) Saddle joint - (b) Between carpal and metacarpal: **Correctly matched**.
- (iv) Gliding joint - (d) Between the carpals: **Correctly matched**.
- (v) Fibrous joint - (e) In flat skull bones: **Correctly matched**.

3. **Identify Incorrect Matches**:
- Based on the analysis, all the pairs are correctly matched. Therefore, there are no incorrectly matched pairs.

4. **Conclusion**:
- Since all pairs are correctly matched, the answer to the question "Which of the following is/are not correctly matched pairs?" is that there are no incorrect pairs.

### Final Answer:
All pairs are correctly matched; hence, there are no incorrectly matched pairs.