$\lim _{n \rightarrow \infty} \frac{1}{\sqrt{n}}\left[1+\frac{1}{\sqrt{2}}+\frac{1}{\sqrt{3}}+\frac{1}{\sqrt{4}}+\ldots+\frac{1}{\sqrt{n}}\right]=$

  • A
    $\sqrt{2}$
  • B
    $2$
  • C
    $\sqrt{2}-1$
  • D
    $2 \sqrt{2}$

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