The 1^st and the last sentences of the passage are numbered 1 and 6. The rest of the passage is split into four parts P, Q, R and S. These four parts are not given in their proper order. Read the sentence and find out which of the four combinations is correct. The find the correct answer and indicate it in the answer sheet.

Q:

1. Rubik's Cube was most popular puzzle in 1980s.
 P. His name was Erno Rubik.
 Q. In 1977 he produced the plastic version.
 R. It was invented by an architect.
 S. The first cube was made of wood.
 6. It won a prize at the Budapest International Fair. 

• 1
  QRPS
• 2
  RSPQ
• 3
  RPSQ
• 4
  PRSQ