Eccentricity of an ellipse whose minor axis is a given fraction of the distance between its foci

1. A.
   $\frac{\sqrt{5}}{3}$
2. B.
   $\frac{\sqrt{3}}{2}$
3. C.
   $\frac{1}{\sqrt{3}}$
4. D.
   $\frac{2}{\sqrt{5}}$

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1. A.
   $\frac{4}{\sqrt{17}}$
2. B.
   $\frac{\sqrt{3}}{16}$
3. C.
   $\frac{3}{\sqrt{19}}$
4. D.
   $\frac{\sqrt{5}}{7}$

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