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An equilateral triangle is inscribed in the parabola `y^(2)=4ax`, where one vertex is at the vertex of the parabola. Find the length of the side of the triangle.

A

`4 a sqrt(3)`

B

`6 a sqrt(3)`

C

`2 a sqrt(3)`

D

`8 a sqrt(3)`

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The correct Answer is:
D
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