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Let AB be a chord of the circle x^2 + y^...

Let AB be a chord of the circle `x^2 + y^2 = r^2` Subtending a right angle at the centre, then the locus of the centroid of the `triangle PAB` as P moves on the circle is

A

a parabola

B

a circle

C

an ellipse

D

None of these

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The correct Answer is:
B
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