The distance between the foci of a hyperbola is double the distance between its vertices and the length of its conjugate axis is $6$. The equation of the hyperbola referred to its axes as axes of co-ordinates is

  • A

    $3{x^2} - {y^2} = 3$

  • B

    ${x^2} - 3{y^2} = 3$

  • C

    $3{x^2} - {y^2} = 9$

  • D

    ${x^2} - 3{y^2} = 9$

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