Match the following neighbouring countries with their official languages correctly.
| Country name | Official Languages |
| 1. Afghanistan | a. Dzongkha |
| 2. Bhutan | b. Burmese |
| 3. Pakistan | c. Dari |
| 4. Myanmar | d. Urdu |
1-c, 2-a, 3-b, 4-d
1-c, 2-a, 3-d, 4-b
1-c, 2-d, 3-a, 4-b
1-a, 2-c, 3-d, 4-b
Identify the structural formula for magnesium hydroxide.