The following question consists of six sentences of a passage. The first and the sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly.S1 : One of the many young scientists who chose to throw in their lot with Rutherford was an Oxford physical chemist, Frederick Soddy.S6 : We now know that Gamma rays are a particularly fierce form of X-rays.P : His association with Rutherford lasted only two years, but that was long enough to change the whole face of physics.Q : He was just 23.R : They found that thorium changed into a new element , thorium X, and in the process gave off what was apparently a gas and at the same time a third type of ray, which they named after the Greek letter ‘Gamma’.S : When he teamed up with Rutherford, they investigated thorium which, as Marie Curie had shown, was radioactive.The proper sequence should be

• A. P Q S R
• B. Q P S R
• C. Q P R S
• D. Q S R P