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. The practice of taking performance boosting drugs among athletesP : but checking it is not going to be easyQ : is generally conceded to be unfairR : of the detection technologyS : for the user is generally one jump aheadThe Proper sequence should be: