UPSC 2013 CDS 2 English Paper

‘P’ will be the first part of the given sequence as it begins withthe word, ‘like’ and begins an analogy. ‘R’ will follow logically as itis the object that is to be compared, that is, ‘population explosion’. Q and S make a logical sequence as they complete the meaning of the sentence. Hence, PRQS is the correct sequence. Thus, option (d) is correct.