The United Nations Organization (UNO) is an international organization founded in 1945. It principally functions through its main organs, which are established by the UN Charter.
Principal Organs of the UNO
General Assembly
Security Council
Economic and Social Council
International Court of Justice
Secretariat
Trusteeship Council
The options provided are:
General Assembly
Trusteeship Council
Security Council
World Health Organization
The 'World Health Organization' (WHO) is not one of the principal organs of the UNO. It is a specialized agency of the United Nations focused on global health issues. Therefore, the correct answer to the question is the 'World Health Organization'.