Direction: The following passage consists of six sentences. The first and the sixth sentences are given. 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 choose the correct order from the options.

S1: Biological evolution has not fitted man to any specific environment.
 

P: It is by no means a biological evolution, but it is a cultural one.
 

Q: His imagination, his reason, his emotional subtlety and toughness, makes it possible for him not to accept the environment but to change.
 

R: And that series of inventions by which man from age by age has reshaped his environment is a different kind of evolution.
 

S: Among the multitude of animals that scamper, burrow swim around us he is the only one who is not locked into his environment.
 

S6: That brilliant sequence of cultural peaks can most appropriately be termed the ascent of man.