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An equilateral triangle is inscribed in the ellipse whose equation is `x^(2)+4y^(2)=4`. One vertex of the triangle (0, 1) and one altitude is contained in the y - axis. If the length of each side is `ksqrt3` units, then k is

A

`(16)/(13)`

B

`(8)/(13)`

C

`(13)/(16)`

D

`(13)/(8)`

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The correct Answer is:
A
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