The differential equation of which $xy = ae^x + be^{-x} + x^2$ is a solution, is

  • A
    $xy'' - 2y' + xy + x^2 - 2 = 0$
  • B
    $xy'' + 2y' - x + x^2 + 2 = 0$
  • C
    $xy'' + 2y' - y + x^2 - 2 = 0$
  • D
    $xy'' + 2y' - xy + x^2 - 2 = 0$

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