Which of the following pairs of countries were trust territories of the United Nations?

Trust territories were territories administered by the United Nations on behalf of their people, until the people of the territories could govern themselves. Of the options given, the pair of countries that were trust territories of the United Nations are Togo and Namibia. Togo was a trust territory under French administration, while Namibia was a trust territory under South African administration. Tanganyika and Ghana were both British colonies that gained independence in the early 1960s, before the creation of trust territories. Cameroon and Niger were also former French colonies that gained independence in the early 1960s, and Botswana was a British protectorate that gained independence in 1966. Zaire (now known as the Democratic Republic of Congo) was a former Belgian colony that gained independence in 1960. Therefore, the correct answer is: Togo and Namibia.