Directions : This question consists of a sentence, parts of which have been jumbled. These parts have been labelled as P, Q, R and S. Given below each sentence are four sequences, namely (a), (b), (c) and (d). You are required to re-arrange the jumbled parts of the sentence and mark your response accordingly. 

of 10 member states(P)/ in Southeast Asia(Q)/ is a political and economic union(R)/ the Association of Southeast Asian Nations,(S)