For the ellipse $\frac{{{x^2}}}{{64}} + \frac{{{y^2}}}{{28}} = 1$, the eccentricity is

  • A

    $\frac{3}{4}$

  • B

    $\frac{4}{3}$

  • C

    $\frac{2}{{\sqrt 7 }}$

  • D

    $1\over3$

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  • [IIT 1998]