The question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph. P- To those who have known comfort, discomfort is a real torture. Q- Comfort is now one of the causes of its own spread. R- The more comfort is brought into the world, the more it is likely to be valued. S- It has now become a physical habit, a fashion, an ideal to be pursued for its own sake.