In the following question, there are six sentences marked S1, S6, P, Q, R and S. The position of S1 and S6 are fixed. Choose one of the four options given below which would be the most logical sequence of the sentences in the passage. S1. While teaching in the class-room, our teacher suddenly fainted. P. The headmaster soon joined us and spoke to them in a soft voice. Q. He was told that the patient needed complete rest for a month.  R. He was at once taken to the hospital. S. The doctors examined him with serious faces. S6.The headmaster at once sanctioned his leave.