Locus of point of intersection of normals drawn at end points of fo...

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Locus of point of intersection of normals drawn at end points of focal chord of a parabola \( y^{2}=4 a x \) is :
\( \mathrm{P} \)
(a) \( y^{2}=a(x-a) \)
(b) \( y^{2}=a(x-2 a) \)
W
(c) \( y^{2}=a(x-3 a) \)
(d) \( y^{2}=a(x-4 a) \)
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