The locus of the poles with respect to the parabola y2 = 4ax of tangent to the hyperbola x2 – y2 = a2 is ..............
a) x2 + y2 = 4a2
b) 4x2 + y2 = 4a2
c) x2 + 4y2 = 4a2
d) x2 – 4y2 = 4a2
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