P. If you look at Britain, for example, people don’t work in coal mine
P. If you look at Britain, for example, people don’t work in coal mines, where they don’t see daylight for weeks and explosions are part of everyday life.
Q. Most people now work in air-conditioned offices.
R. So, technology over the long run is an extremely positive thing, but it can create short-term disruptions.
S. If you look at history, it has been overwhelmingly positive in terms of technological progress.
Right Answer is: B
Sentence 1: The first sentence must introduce the subject matter of the paragraph to the reader. Sentence S does the same by introducing the topic of positive effect of technological advancement.
Sentence 2: In order to elucidate and support the same, Sentence P gives example of Britain.
Sentence 3: Sentence Q is a continuation of the previous sentence. Thus, it will come at the third place.
Sentence 4: Sentence R mentions that the technological advancement is good in the long run, though it can create some short-term disruptions and concludes the paragraph.
Therefore, the correct sequence should be SPQR.