In the following items, each passage consists of six sentences. The first and the sixth sentence are given in the beginning as `S_(1) and S_(6)`. The middle four sentences in each have been removed and jumbled up. These are labelled P, Q, R and S. You are required to find out the proper sequence of the four sentences and mark accordingly on the Answer Sheet.
`S_(1)` : John Young, the astronaut, piloted the 75-ton space-shuttle, Columbia.
`S_(6)` : And it moved smoothly to a stop as the crew rushed to greet it.
P : The Columbia, however, landed safely at the Edwards Air Force base in the Mojave desert.
Q : The space-shuttle circled the Earth 36 times.
R : It was dangerous because a re-usable craft was being used now.
S : This flight was fraught with dangers.
The proper sequence should be :
(a) P-Q-S-R
(b) S-Q-R-P
(c) P-R-S-Q
(d) Q-S-R-P