The correct answer is option 4 - Turkey. Recently, the United Nations agreed to change the name of the country Turkey. However, it is important to note that the statement in the question is not entirely accurate. The United Nations did not agree to change the name of Turkey, as Turkey has not officially changed its name.

Turkey has been a member of the United Nations since 1945, and its official name within the organization is "The Republic of Turkey." The name change that is often referred to is related to the country`s full official name. While the United Nations recognizes the country as "The Republic of Turkey," the official name of the country, as recognized by the Turkish government, is "The Republic of Turkey" as well.

It is important to be cautious with statements that claim a recent change in the name of a country without proper evidence or documentation to support it. In this case, the statement in the question is not accurate, and the correct answer should be option 4 - Turkey.