‘Q’ will be the first part of the given sequence as it refers back tothe previous statement which is clearly indicated form the words,‘This belief’and reveals its actual sense. ‘P’ will follow next as it is in contrast to the previous statement which is indicated from the word, ‘but’. ‘R’ will come next as it is in continuation with the previous statement which is clearly indicated form the word, ‘He said’ and clarifies the points of the subject. ‘S’ will follow logically as it throws light on the result of the previous statement. Hence, QPRS is the correct sequence. Thus, option (b) is correct.