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 : Species that escape extinction tend to be clever opportunists, such as housefly, rat, English sparrow and plants like weeds.
P : The floors were soon littered with flies, supplying a feast for lizards and other fly catchers which were in turn poisoned by the DDT and supplied a further feast for local cats.
Q : But predators and parasites too can be sensitive to man’s incursions.
R : Normally these species are prevented from breeding to pest proportions by predators and parasites.
S : Consider the domino effect unleashed when the government in Borneo tried to control mosquitoes and drenched the villagers’ dwelling with DDT.

S6 : Soon cats were dying on all sides, whereupon rats, which had not been a problem so long as there were plenty of cats, enjoyed a field day.