If $y = x + \frac{1}{x}$,then

  • A
    $x^2 \frac{dy}{dx} + xy = 0$
  • B
    $x^2 \frac{dy}{dx} + xy + 2 = 0$
  • C
    $x^2 \frac{dy}{dx} - xy + 2 = 0$
  • D
    None of these

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