If the origin is shifted to $(2,3)$ and the axes are rotated through an angle $45^{\circ}$ about that point,then the transformed equation of $2 x^2+2 y^2-8 x-12 y+18=0$ is

  • A
    $x^2-7 y^2-14 x y-2=0$
  • B
    $x^2+y^2=4$
  • C
    $x^2-y^2=4$
  • D
    $8 x^2-2 y^2=9$

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