Directions: In the question given below, the first and sixth sentence are given in the beginning as S1 and S6. The middle four sentences have been jumbled up. These are labelled as P, Q, R and S. You are required to find out the proper sequence of the four sentences and mark it as your answer.
S1 : Great quantities of animal oil come from whales. S6 : A few other creatures also yield oil. P : It produces a great quantity of oil which can be made into food for human consumption. Q : These enormous creatures of the sea are the largest remaining animals in the world. R : When the whale is killed, the blubber is stripped off and boiled down. S : To protect the whales from the cold of the Arctic seas, nature has provided them with a thick covering of fat called blubber.