In the following items, each passage consists of six sentences. The first sentence (S1) and the final sentence (S6) are given. 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. 

S1: Louis Pasteur had a very busy and · interesting life. 
P: Among the people whom Pasteur was able to help were brewers, breeders of silkworms, and cowkeepers, 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. 
S6: He was always very proud of being able to help his country in this way.