'P' will be the first part of the given sequence as 'the police commissioner' forms the central idea of the given order. 'S' will come next as 'rushed the police force' forms the logical phrase together. 'R' will follow next as it states the reason why the police force was rushed by the commissioner. 'Q' will be the last part of the given order as 'to control the crowd' is the logical part together. Hence, PSRQ is the correct sequence. Thus, option (c) is correct.