Concept:The passage describes the 1857 Revolt. The correct sequence connects S1 and S6 logically, starting with the mutiny and ending with its participants.
Explanation:S1 introduces the Revolt: "A mighty popular Revolt broke out in Northern and Central India in 1857."
Sentence S begins the description: "It began with a mutiny of the" — this directly follows S1.
Sentence P specifies who mutinied: "Sepoys, or the Indian soldiers of the Company's army" — this follows S logically.
Sentence Q extends the idea: "but soon engulfed wide regions and involved the masses" — this continues from P.
Sentence R states the effect: "and nearly swept away the British rule" — this concludes the middle section.
S6 gives the final detail: "Millions of peasants, artisans and soldiers fought heroically and wrote a glorious chapter."
Thus the correct order is S, P, Q, R, which matches option C: S P Q R.
Answer:C. S P Q R