GENERAL KNOWLEDGE

Detailed explanation-1: -The Berlin Wall was built by the German Democratic Republic during the Cold War to prevent its population from escaping Soviet-controlled East Berlin to West Berlin, which was controlled by the major Western Allies. It divided the city of Berlin into two physically and ideologically contrasting zones.

Detailed explanation-2: -Berlin, although located within the Soviet zone, was also split amongst the four powers. The American, British and French sectors would form West Berlin and the Soviet sector became East Berlin.

Detailed explanation-3: -It consisted of the American, British, and French occupation sectors established in 1945. The Berlin Wall, built in 1961, physically separated West Berlin from its East Berlin and East German surroundings until it fell in 1989.