The practice of taking performance boosting drugs among athletes P : but checking it is not going to be easy Q : is generally conceded to be unfair R : of the detection technology S : for the user is generally one jump ahead The Proper sequence should be:

Answer: Option B

The practice of taking performance boosting drugs among athletes is generally conceded to be unfair but checking it is not going to be easy for the user is generally one jump ahead of the detection technology.