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If two tangents drawn from the point `(alpha,beta)` to the parabola `y^2=4x` are such that the slope of one tangent is double of the other, then prove

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If two tangents drawn from the point `(alpha,beta)` to the parabola `y^2=4x` are such that the slope of one tangent is double of the other, then prove that `alpha=2/9beta^2dot`
A. `9y=2x^(2)`
B. `9x=2y^(2)`
C. `2x=9y^(2)`
D. none of these
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Correct Answer - B
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