If $4ab = 3h^2$,then the ratio of the slopes of the lines represented by $ax^2 + 2hxy + by^2 = 0$ is

  • A
    $\sqrt{3} : 1$
  • B
    $1 : \sqrt{3}$
  • C
    $1 : 3$
  • D
    $3 : 1$

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