Arrange the following in chronological order of their happening:
(i) India-China War
(ii) India’s first test of a nuclear device
(iii) Terrorists attack on World Trade Centre in America
(iv) The Anti-Ballistic Missile Treaty
Choose the correct option:
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?