$\lim _{n}$ ${\rightarrow \infty}\left[\left(1+\frac{1}{n^2}\right)\left(1+\frac{2^2}{n^2}\right) \ldots \left(1+\frac{n^2}{n^2}\right)\right]^{1 / n}=$

  • A
    $e$
  • B
    $2 e$
  • C
    $2 e^{\frac{\pi-2}{2}}$
  • D
    $2 e^{\frac{\pi-4}{2}}$

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