Match the following:
| List–I | List–II |
|---|---|
| A. Ball and socket joint | I. Inter carpal joint |
| B. Hinge joint | II. Between humerus and Pectoral girdle |
| C. Pivot joint | III. Between carpals and metacarpals |
| D. Gliding joint | IV. Between atlas and axis |
| V. Knee joint |
If vector \( \mathbf{a} = 3 \hat{i} + 2 \hat{j} - \hat{k} \) \text{ and } \( \mathbf{b} = \hat{i} - \hat{j} + \hat{k} \), then which of the following is correct?