The following six sentences come from a paragraph. The first and the last sentences are given. Choose the order in which the four sentences (PQRS) should appear to complete the paragraph.
S1 : Eighteen years ago, Germany became whole and free again after forty years of cruel partition.
S6: On October 3, 1990, reunification was ceremoniously enacted.
P : But on November 9, 1989, the Berlin Wall was miraculously breached.
Q : Within ten months after the Wall came down, Germany had regained its national unity.
R : Not many contemporaries had expected this to happen, or to happen within the span of their lifetime.
S : The Cold War was suddenly over, the Iron Curtain collapsed, communism melted away.
Select the correct sequence.