‘R’ will be the first part of the given sequence as it contains the object to complete the given statement, that is, ‘the house’. ‘S’ will come next as it tells us about the condition of the object, that is, ‘was so dirty’. ‘P’ will follow next as it starts with the word, ‘that’ and refers back to the first statement. ‘Q’ will follow logically as it completes the information provided in ‘P’. So, RSPQ becomes the right sequence of words. Hence, option (d) is correct.