P: the country concludes a bitterly fought election during which Q: an
Q: and norms breached
R: boundaries of civil public debate have been crossed
S: some self-reflection is called for as
Right Answer is: B
The first Statement would be S as it gives the introductory line to the passage. It then must be followed by a reason for the same. P gives the reason and becomes the second statement. R will be the next statement as it mentions what happened during elections. R and Q are in a pair; therefore, they will be the last statements. Thus, the correct sequence is SPRQ.