$\lim _{n}$ ${\rightarrow \infty}\left[\left(1+\frac{1}{n^2}\right)\left(1+\frac{4}{n^2}\right)\left(1+\frac{9}{n^2}\right) \ldots \left(1+\frac{n^2}{n^2}\right)\right]^{1 / n}=$

  • A
    $16 e^{-1}$
  • B
    $e^{\frac{\pi}{2}-2}$
  • C
    $2 \log 2-1$
  • D
    $2+e^{\frac{\pi-4}{2}}$

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