Which one of the following countries was the last UN 'trust territory' to gain independence, leading to the suspension of the Trusteeship Council?

Palau

The correct answer is Option (1) → Palau

Palau was the last United Nations trust territory under the administration of the United States. It gained independence on 1 October 1994, after which the UN Trusteeship Council suspended its operations, as all trust territories had achieved self-governance or independence.

*****