The equations of the tangents drawn from the origin to the circle ${x^2} + {y^2} - 2rx - 2hy + {h^2} = 0$ are

  • [IIT 1988]
  • A

    $x = 0,y = 0$

  • B

    $({h^2} - {r^2})x - 2rhy = 0,x = 0$

  • C

    $y = 0,x = 4$

  • D

    $({h^2} - {r^2})x + 2rhy = 0,x = 0$

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