In each question, the first and the last sentences of the passage are numbered 1 and 6 respectively. The rest of the passage is split into four parts. These four sentences are jumbled. Read the sentences and identify their correct and logical order. 1 : Charles Goodyear once accidentallyP : and found that the resulting rubberQ : dropped a mixture of natural rubberR : was harder, stronger, more elasticS : and sulphur over a hot stove6 : and non-stickyThe Proper sequence should be: