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P(3,1), Q(6,5) and R(x,y) are three poin...

P(3,1), Q(6,5) and R(x,y) are three points such that the angle PRQ is a right angle and the area of `triangleRPQ=7`. Then the number of such points R is

A

0

B

1

C

2

D

infinity

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A
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