‘R’ will be the first part of the given sequence as it is in contrast to the given sentence and refers back to S1 with the words, ‘It took several years to build Rome and bring it to the state of pomp and splendor’. ‘P’ will come next as it contains the word, ‘same’ and refers back to the situation mentioned in ‘R’. ‘S’ will be next as it is in continuation with the previous statement which is clearly indicated from the words, ‘When we wish to do a great thing, we cannot expect success in a moment’. ‘Q’ will follow ‘S’ logically as it completes the meaning of the passage which is clear from the words, ‘We should carry on our work with patience and perseverance’. Hence, RPSQ is the correct sequence. Thus, option (a) is correct