Final answer:
The incorrect alliance is East Germany-United States, as they were on opposite sides during the Cold War, with East Germany in the Soviet-led Warsaw Pact and the United States leading NATO.
Step-by-step explanation:
The alliance that is NOT accurate is d. East Germany-United States. During the Cold War, East Germany was a member of the Warsaw Pact, which was a political and military alliance led by the Soviet Union and composed of communist nations in Eastern Europe. The United States, on the other hand, was a leader of the North Atlantic Treaty Organization (NATO), a military alliance formed with Canada and Western European countries to counter the Soviet threat. Therefore, an alliance between East Germany and the United States would be historically inaccurate as they were on opposing sides of the ideological divide during the Cold War era.