Match Column I with Column II regarding the Buddhist texts and choose the correct option from the following:
| Column I (Buddhist Text) | Column II (Description) |
|---|---|
| a. Vinaya Pitaka | i. Rules and regulations for monastic order |
| b. Abhidhamma Pitaka | ii. Chronicle of the island |
| c. Dipavamsa | iii. Regional histories of Buddha |
| d. Mahavamsa | iv. Dealt with philosophical matters |
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?