If two different tangents of \( y^{2}=4 x \) are the normals to \( ...

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If two different tangents of \( y^{2}=4 x \) are the normals to \( x^{2}=4 b y \), then
(A) \( |b|\frac{1}{2 \sqrt{2}} \)
(B) \( \quad|b|\frac{1}{2 \sqrt{2}} \)
\( \mathrm{P} \)
(C) \( |b|\frac{1}{\sqrt{2}} \)
(D) \( |b|\frac{1}{\sqrt{2}} \)
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