Concept:The paragraph describes how the Subsidiary Alliance system gave the British strategic military and financial advantages.
Explanation:The first sentence (S1) introduces the idea that the system was very advantageous for the British.
Sentence P logically follows because it explains that under this system the British could maintain a large army using Indian state funds.
Sentence S continues by stating that this allowed the British to fight wars far away from their own territory.
Sentence Q introduces a conditional clause, “if any war occurred in the territories.”
Sentence R completes the condition by specifying the territories of either the British ally or the British themselves.
The last sentence (S6) concludes by stating that the British controlled the defence and foreign relations of the protected ally.
Thus, the correct sequence of the middle sentences is P, S, Q, R.
Answer:The proper sequence is P S Q R, which corresponds to option B.