To arrange the airports from west to east, we need to consider their geographical locations:
- Aden is the westernmost of the listed airports.
- Mumbai is to the east of Aden, located in India.
- Beijing is further to the east of Mumbai, in China.
- Tokyo is the easternmost airport of all, located in Japan.
Thus, the correct order from west to east is: Aden, Mumbai, Beijing, and Tokyo.
The correct option is (D) iii, iv, i and ii.
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?