If the tangents and normals at the extre...

If the tangents and normals at the extremities of a focal chord of a parabola intersect at `(x_1,y_1)` and `(x_2,y_2),` respectively, then (a)`x_1=y_2` (b) `x_1=y_1` (c)`y_1=y_2` (d) `x_2=y_1`

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