Which of the following statements is correct?

a- The Berlin wall was built in 1971.
b- It stood for 28 years before it was finally broken down by the people.

Only statement b is correct.

The Berlin Wall was built in 1961.

The Berlin Wall stood for 28 years before its fall in 1989. The Berlin Wall did not mark the beginning of the Cold War; it was built during the Cold War as a physical division between East and West Berlin. The Berlin Wall symbolised the division between the capitalist and the communist world. Built in 1961 to separate East Berlin from West Berlin, this more than 150-kilometre-long wall stood for 28 years and was finally broken by the people on 9 November 1989. This marked the unification of the two parts of Germany and the beginning of the end of the communist bloc.