Correct option is D
The headquarters of the Universal Postal Union (UPU) is located in Berne, Switzerland. The UPU, established in 1874, is a specialized agency of the United Nations that coordinates international postal services.
Information Booster
The UPU plays a critical role in ensuring global cooperation in postal services, allowing the smooth exchange of mail between countries. Switzerland has been the host nation for the UPU since its inception.
Additional Knowledge
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Geneva: Hosts many international organizations, but not the UPU.
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New York: U.N. headquarters but not related to postal services.
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Rome: Hosts agencies like FAO, but not the UPU.