Direction: In this section, each item consists of six sentences of a passage. The first and sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled as P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly on the answer sheet.

S1: Then what is necessary with regard to taming science and technology is:

S6: Then why do we not tame atomic energy to peaceful purposes? 

P: We must have the basic knowledge of the two.

Q: It is said, 'Science is a useful servant but destructive master'. 

R: By the misuse of science, mankind will meet its doom quite soon. 

S: If we do not harness it for the welfare of mankind, I am afraid, total annihilation is a must. 

The correct sequence should be