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Normal at the point P(a p^2,2a p) meets...

Normal at the point `P(a p^2,2a p)` meets the parabola `y^2=4a x` again at `Q(a q^2,2a q)` such that the lines joining the origin to `Pa n dQ` are at right angle. Then, (a) `P^2=2` (b) `q^2=2` (c)`p=2q` (d) `q=2p`

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