UPSC CDS English Ordering of Words in a Sentence Part 1 Questions

The subject is already given and it is followed by R as it contains the verb ‘are’. P also has the verb but it starts from conjunction/connector hence, it logically cannot follow the subject. As per the given options, R is followed by P. P can be followed logically by S and not by Q. Thus, it is clear that the correct option is (c).