The following passage consists of six sentences. The first and the sixth sentence (as S1 and S6) are given in the beginning. The middle four sentences in each have been removed and jumbled up. These are labelled as P, Q, R and S. You are required to find out the proper sequence of the four sentences S1: People have wrong calculations about Japan's population. S6: So it is very high in Japan. P: No, this is not true. Q: And old people die more often than the young. R: There are more old people in Japan. S: The question is whether Japan has a lower death rate.