Concept:Arrange jumbled sentences in a logical order that flows naturally from the introduction to the conclusion.
Explanation:Sentence P follows S1 because it describes the river's perennial nature and heavy rains.
Next, Q explains how Vijayanagara rulers dammed the river for irrigation, linking to its rain-bearing character.
Sentence S then describes the rocky bed of the headstreams, providing a detail about the river's source.
Finally, R tells the direction the united stream takes, leading smoothly to S6 about its historic role as a frontier.
The correct sequence is P, Q, S, R.
Answer:Option A: PQSR