\( P \) and \( Q \) are two distinct points on the parabola, \( \ma...

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\( P \) and \( Q \) are two distinct points on the parabola,
\( \mathrm{P} \) \( y^{2}=4 x \), with parameters \( t \) and \( t_{1} \) respectively. If the

W normal at \( P \) passes through \( Q \), then the minimum value of \( t_{1}^{2} \) is:
(1) 2
(2) 4
(3) 6
(4) 8
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