The locus of a point from which the lengths of the tangents to the circles \( x^{2}+y^{2}=4 \) a...

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The locus of a point from which the lengths of the tangents to the circles \( x^{2}+y^{2}=4 \) and \( 2\left(x^{2}+y^{2}\right) \) \( -10 x+3 y-2=0 \) are equal to
(a) a straight line inclined at \( \pi / 4 \) with the line joining the centres of the circles
(b) a circles
(c) an ellipse
(d) a straight line perpendicular to the line joining the centes of the circles
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