The distance between the two parallel lines represented by $8x^2 - 24xy + 18y^2 - 6x + 9y - 5 = 0$ is

  • A
    $0$
  • B
    $\frac{3}{4\sqrt{13}}$
  • C
    $\frac{6}{\sqrt{13}}$
  • D
    $\frac{7}{2\sqrt{13}}$

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