Locus of the points from which perpendicular tangent can be drawn to t

1.	Locus of the points from which perpendicular tangent can be drawn to the circle \[{{x}^{2}}+{{y}^{2}}={{a}^{2}}\], is
A.	A circle passing through origin
B.	A circle of radius 2a
C.	A concentric circle of radius \[a\sqrt{2}\]
D.	None of these
Answer» D. None of these

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Locus of the points from which perpendicular tangent can be drawn to the circle \[{{x}^{2}}+{{y}^{2}}={{a}^{2}}\], is

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