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. Everyone has a mental picture of volcanoes.
P. This is the crater and it is the mouth of the volcano.
Q. In appearance it looks like a cone-shaped mountain.
R. The lava forces its way up this and overflows to form the sides of the volcano.
S. The top of the cone is rather flat and hollow.
6. Thus the volcano mountain is formed from the lava. 

• 1
  QSPR
• 2
  SPQR
• 3
  RSPQ
• 4
  QRSP