Direction: In this section, each item consists of six sentences of a passage. The first and the sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled as P, Q, R, and S. You are required to find the proper sequence of the four sentences and mark your response accordingly on the Answer Sheet.

S1 : The rate at which the world population is increasing gives the impression of an explosion.
S6 : Diseases, for which no cure or prevention was known, caused terrible mortality, and the social disruption because of wars lowered the birth rate.
P :  How did this situation come about?
Q : For centuries before the Industrial Revolution, the human population was held in check by natural disasters over which they had no control.
R : This phenomenal increase is still continuing and estimates predict that the world population will be doubled by the year 2010.
S :  Starvation followed when crops failed.

The correct sequence should be: