The set of points on the axis of the parabola \( y^{2}-4 x-2 y+5=0 \) from which all the three n...

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The set of points on the axis of the parabola \( y^{2}-4 x-2 y+5=0 \) from which all the three normals
\( \mathrm{P} \) to the parabola are real is

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(a) \( (k, 0) ; k1 \)
(b) \( (k, 1) ; k3 \)
(c) \( (k, 2) ; k6 \)
(d) \( (k, 3) ; k8 \)
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