‘R’ will be the first part of the given sequence as per the subjectverb agreement rule, that is, “that Ram fell down”. S will follow R as it talks about the consequence of falling down. ‘P’ will come next as it tells us when the action took place, that is, ‘while playing’. ‘Q’ will follow logically as it tells us more about the situation mentioned in ‘P’, that is, ‘with the boys’. So, RSPQ becomes the right sequence of words. Hence, option (a) is correct.