If the coordinate axes are the bisectors of the angles between the pair of lines $ax^2 + 2hxy + by^2 = 0$ where $h^2 > ab$ and $a \neq b$,then

  • A
    $a + b = 0$
  • B
    $h = 0$
  • C
    $h \neq 0, a + b = 0$
  • D
    $a + b \neq 0$

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