With reference to the land revenue system of the Mughals, match Column-I with that of Column-II:
Match Column-I with Column-II regarding Vijayanagara Empire and choose the correct option:
| Column-I (Travellers who visited Vijayanagara Empire) | Column-II (Country they belonged) |
|---|---|
| I. Nicolo de Conti | a. Persia |
| II. Abdur Razzak | b. Portugal |
| III. Duarte Barbosa | c. Italy |
| IV. Afanasi Nikitin | d. Russia |
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?