The area of the triangle formed by the lines $y^2 - 9xy + 18x^2 = 0$ and $y = 9$ is

  • A
    $9$ sq. units
  • B
    $\frac{27}{2}$ sq. units
  • C
    $\frac{27}{4}$ sq. units
  • D
    $27$ sq. units

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