Which among the following countries was a Sultanate till 1968?

Maldives

The correct answer is Option (4) → Maldives

The Maldives was a Sultanate till 1968 when it was transformed into a republic with a presidential form of government. In June 2005, the parliament of the Maldives voted unanimously to introduce a multi-party system. The Maldivian Democratic Party (MDP) dominates the political affairs of the island. The MDP won the 2018 Elections.