| Column-I (Foreign Travellers) | Column-II (Countries) |
|---|---|
| a. Afanasi Nikitin | II. Russia |
| b. Domingo Paes | III. Portugal |
| c. Abdur-Razzak | I. Persia |
| d. Nicolo de Conti | IV. Italy |
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?