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Bunuel
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PR = 4/3 * PQ, so, QR = 1/3 * PQ.

PQ : QR = 3QR : QR = 3:1. Ans - B.
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let pq=x, therefore pr=(4/3)x

hence qr=x/3

pq/qr= x*(3/x) ..........B

ans 3/1
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Using PQ/QR=PQ/(PR-PQ)
Now substitute PQ in terms of PR above and find the ratio.
B should be the answer.
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