‘S’ will be the first part of the given sequence as per the subject verb agreement rule, that is, ‘to go shopping’. ‘Q’ will come next as it tells the time the action is taking place, that is, ‘that afternoon’. ‘R’ will follow next as it tells the objective of the action talked aboutin ‘Q’ which will be followed by ‘P’ which completes the sentence.Hence, SQRP is the correct sequence. Thus, option (b) is correct.