If one of the slopes of the pair of lines $ax^{2}+2hxy+by^{2}=0$ is $n$ times the other,then

  • A
    $4(n+1)^{2}ab=nab$
  • B
    $4h^{2}=(n+1)^{2}ab$
  • C
    $4nh^{2}=(n+1)^{2}ab$
  • D
    $4ab=(n+1)^{2}h$

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