‘R’ will be the first part of the given sequence as ‘which’ is used in relation to ‘the bag’ mentioned in the opening part of the sentence. ‘QP’ will follow next and will make a pair together as ‘there were perhaps two or three other children makes a logical phrase together. ‘S’ will obviously be the last part of the given sequence. Hence, RQPS is the correct sequence. Thus, option (d) is correct.