‘Q’ will be the first part of the given sequence as it is in continuation with the previous statement which is clearly indicatedfrom the words, ‘First’, ‘S’ will follow next as it is in continuation with the previous statement which is clearly indicated from the words, ‘At once he saw. ‘R’ will come next as it refers back to the previous statement and describes the situation further. ‘P’ will follow logically which is clear from the words, ‘It was later’. Hence, QSRP is the correct sequence. Thus, option (c) is correct.