The following six sentences come from a paragraph. The first and the last sentences are given. Choose the order in which the four sentences (PQRS) should appear to complete the paragraph.
S1 : Louis Pasteur had a very busy and interesting life.
S6 : He was always very proud of being able to help his country in this way.
P : Among the people whom Pasteur was able to help were brewers, breeders of silkworms, and cow-keepers, all of whom were trying to carry on important industries.
Q : He worked hard in his laboratory with test tubes and all kinds of experiments.
R : He was working to help people who were suffering in some special way from disease.
S : He not only made some exciting discoveries about germs but he was able to use his discoveries in very practical ways.
The proper sequence should be: