Find the general solution of the differential equation: $\frac{dy}{dx} = (1+x^2)(1+y^2)$

  • A
    $\tan^{-1} y = x + \frac{x^3}{3} + C$
  • B
    $\tan^{-1} y = x + x^3 + C$
  • C
    $\tan^{-1} y = \frac{x^3}{3} + C$
  • D
    $\tan^{-1} y = x^2 + \frac{x^3}{3} + C$

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