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. Today the Earth has many satellites besides the moon. P. But the pull of the earth keeps them from doing so. Q. The artificial satellites do not fall because they are going too fast to do so. R. They are artificial satellites made by man and very smaller than the moon. S. As they speed along, they tend to go straight off into space. S6. As a result, they travel in an orbit round the earth.