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If the normals at three point A, B, C of...

If the normals at three point A, B, C of a parabola meet in a point, then the centroid of `DeltaABC` lies on (A) a line parallel to y-axis (B) a line perpemndicular to y-axis different from the axis of the parabola (C) axis of the parabola (D) the line `y=x`

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