For the parabola \( y^{2}=4 a x \), let \( T=(-a, 0) \). If \( P P^{\prime} \) is a double ordin....

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For the parabola \( y^{2}=4 a x \), let \( T=(-a, 0) \). If \( P P^{\prime} \) is
P
a double ordinate of the parabola at \( P T \) and meets the curve again at \( Q \), then \( P^{\prime} Q \) passes through the point
(1) \( (4 a, 0) \)
(2) \( (3 a, 0) \)
(3) \( (2 a, 0) \)
(4) \( (a, 0) \)


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