In an ellipse, the distance between its foci is $6$ and minor axis is $8.$ Then its eccentricity is :

  • A

    $\frac{3}{5}$

  • B

    $\frac{1}{2}$

  • C

    $\frac{4}{5}$

  • D

    $\frac{1}{\sqrt 5}$

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