Which of the following agencies is excluded from the Other Government Agencies (OGA) category?

The Central Intelligence Agency (CIA) is excluded from the Other Government Agencies (OGA) category primarily because of its distinct role within the United States government. The CIA is primarily focused on foreign intelligence and is part of the U.S. intelligence community, which operates under different authorities and guidelines compared to domestic law enforcement or other governmental functions.

While the other agencies listed—FBI, NSA, and DHS—may operate in overlapping areas, they also engage more directly in law enforcement and domestic security aspects, which can lead them to be categorized as OGAs when working alongside military and coast guard operations. The CIA's main charter is to gather, process, and analyze national security information from around the world, distinguishing it from the other agencies that have both domestic and international responsibilities but are more involved in law enforcement activities.