‘S’ will be the first part of the given sequence as it states what was found by Mr. and Mrs. Robert when they reached home late last night (as stated in S1), that is, the front door was open. ’P’ will come next as it states that they found somebody had broken open the lock. ‘R’ will come next because it shows that after they found that somebody had broken up in their house, they entered the house with a fear. ‘Q’ will come next as it tells that with fear when they entered, they found all their things missing. Hence, SPRQ is the right sequence. Thus, option (d) is correct.