Directions: The following passage consists of six sentences. The first and sixth sentences are given in the beginning as S1 and S2, respectively. 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.
S1: The first principal use of whale oil was as an illuminant in lamps and as candle wax. S2: And before general refining of crude oil commenced in Oil Creek Valley and elsewhere. P: It did not have a disagreeable odour like the oil from right whales did. Q: The whale fishery, however, was in a declining state and had been so a decade or more before Drake struck petroleum in his drilled well. R: In the 1700's, it was noted that the burning oil from sperm whales glowed brightly and clearly S: The sperm whale was the main whale being sought for its oil when the petroleum industry opened in 1859.