The ellipse $E_1: \frac{x^2}{9}+\frac{y^2}{4}=1$ is inscribed in a rectangle $R$ whose sides are parallel to the coordinate axes.

Another ellipse $E _2$ passing through the point $(0,4)$ circumscribes the rectangle $R$.. The eccentricity of the ellipse $E _2$ is

  • [IIT 2012]
  • A

    $\frac{\sqrt{2}}{2}$

  • B

    $\frac{\sqrt{3}}{2}$

  • C

    $\frac{1}{2}$

  • D

    $\frac{3}{4}$

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