Directions: The following question consists of six sentences. The first sentence (S1) and final sentence (S6) are given in the beginning. The middle four sentences in each have been jumbled up. They are labeled P, Q, R and S. You are to find the correct sequence of the four sentences.S1: Nowadays we pay a great deal of attention to pure air, open windows and garden cities. S6: Pasteurised milk is milk which has been treated in this way. P: Another useful discovery of Pasteur's was the process, now called, pasteurization. Q: Pasteur was one of the first to show how necessary all these are if we are to fight against germs and disease. R: Pasteur helped them by showing that by heating win or milk to a temperature of 60 degree Centrigrade, the germs were made harmless. S: Some wine-growers were troubled by a germ which has turned their win sour.