‘P’ will be the first part of the given sequence as the pronoun‘they’ is used in connection to ‘the colonial power’ mentioned in the opening sentence. It will be followed by ‘S’ as ‘loyalties of those locals’ is used in the context of ‘tribes and people together’ in the very previous point. RQ will make a pair together as both the sentences are talking about ‘divide and rule’ concept. Hence, PSRQ is the correct sequence. Thus, option (b) is correct.