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S(1) and S(2) are the foci of an ellipse...

`S_(1)` and `S_(2)` are the foci of an ellipse and B is the end of the minor axis. If the triangle `S_(1) S_(2) B` is an equilateral triangle, then eccentricity of the ellipse is

A

` (2)/(3)`

B

` (1)/(3)`

C

`(1)/(4)`

D

`(1)/(2)`

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The correct Answer is:
D
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