If $a(p + q)^2 + 2bpq + c = 0$ and $a(p + r)^2 + 2bpr + c = 0$,then $qr$ =

  • A
    $p^2 + \frac{c}{a}$
  • B
    $p^2 + \frac{a}{c}$
  • C
    $p^2 + \frac{a}{b}$
  • D
    $p^2 + \frac{b}{a}$

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