In the following items, each passage consists of six sentences. The first and the sixth sentence are given in the beginning as S1 and 56. The middle four sentences in each have been removed and jumbled up. These are labelled P, Q, R and S. You are required to find out the proper sequence of the four sentences and mark your response accordingly on the Answer Sheet.
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

Options

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