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 out the proper sequence of the four sentences and mark your response accordingly on Answer Sheet. S1 : "Every person carries in his head a mental model of the world — a subjective representation of external reality," writes Alvin Toffler in Future Shock . S6 : When we begin to think we can do so only because our mind is already filled with all sorts of ideas with which to think. P : It organizes our knowledge and gives us a place from which to argue. Q : This mental model is, he says, like a giant filing cabinet. R : It contains a slot for every item of information coming to us. S : As E.F. Schumacher says, "When we think, we do not just think; we think ideas." The correct sequence should be