Observe the following statements:
$I$. If $dy + 2xy dx = 2e^{-x^2} dx$, then $ye^{x^2} = 2x + c$.
$II$. If $ye^{-x^2} - 2x = c$, then $dx = (2e^{-x^2} - 2xy) dy$.
Which of the following is a correct statement?

  • A
    Both $I$ and $II$ are true
  • B
    Neither $I$ nor $II$ is true
  • C
    $I$ is true, but $II$ is false
  • D
    $I$ is false, but $II$ is true

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