The correct answer is: A. Trusteeship Council
The Trusteeship Council is one of the six principal organs of the United Nations. It was established in 1945 to oversee the administration of trust territories, which were territories that were not self-governing and were placed under the administration of a trusteeship agreement between the United Nations and one or more member states.
The Trusteeship Council has ceased to be operational since 1994, when the last trust territory, Palau, became independent. However, the Trusteeship Council remains in existence as a symbol of the United Nations’ commitment to decolonization.
The other options are incorrect because they are all still operational organs of the United Nations.
- The Secretariat is the administrative organ of the United Nations. It is headed by the Secretary-General, who is appointed by the General Assembly on the recommendation of the Security Council.
- The International Court of Justice is the principal judicial organ of the United Nations. It settles legal disputes between states and gives advisory opinions on legal questions referred to it by authorized United Nations organs and specialized agencies.
- The Economic and Social Council is responsible for promoting international economic and social cooperation and development. It is composed of 54 members elected by the General Assembly for three-year terms.