In the following item, passage consists of six sentences. The first and sixth sentence are given in the beginning as `S_1` and `S_6`. The middle four sentences in each have been jumbled up. These are labelled P, Q, R and S. You are required to find out the proper sequence of the four sentences and indicate your answer accordingly on the Answer Sheet.
`S_1` : Great quantities of animal oil come from whales.
`S_6` : 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 it with a thick covering of fat called blubber.
The proper sequence should be : (a) PSRQ (b) QSRP (c) PRQS (d) RPQS

Options

A. PSRQ
B. QSRP
C. PRQS
D. RPQS