‘R’ will be the first part of the given sequence as it introduces the first of the two schools (referred in S1). Q will follow it because the expression ‘they say’ is used in relation to ‘first school’ in R. ‘P’ will come next as it talks about the teachings of the second school. ‘S’ will come next as it clarifies the point made by the second school of thought. Hence, RQPS is the right sequence. Thus, option (d) is correct