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Consider the circle x^2 + y^2 = 9 and th...

Consider the circle `x^2 + y^2 = 9` and the parabola `y^2 = 8x`. They intersect at P and Q in first and fourth quadrant respectively. Tangents to the circle at P and Q intersect the x-axis at R and tangents at the parabola at P and Q intersect the x-axis at S. The radius of the circumcircle of the triangle PRS is-

A

`1:sqrt2`

B

`1:2`

C

`1:4`

D

`1:8`

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The correct Answer is:
C
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