If a line y=3x+1 cuts the parabola x^2-4...

If a line `y=3x+1` cuts the parabola `x^2-4x-4y+20=0` at `A and B ,` then the tangent of the angle subtended by line segment `A B` at the origin is (a) `(8sqrt(3))/(205)` (b) `(8sqrt(3))/(209)` (c)`(8sqrt(3))/(215)` (d) none of these

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