If for a hyperbola the ratio of length of conjugate Axis to the length of transverse axis is $3 : 2$ then the ratio of distance between the focii to the distance between the two directrices is
If for a hyperbola the ratio of length of conjugate Axis to the length of transverse axis is $3 : 2$ then the ratio of distance between the focii to the distance between the two directrices is
- A
$13 : 4$
- B
$4 : 13$
- C
$\sqrt {13} :2$
- D
$2:\sqrt {13} $
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