$\lim _{x \rightarrow \infty} x^3 \left[ \sqrt{x^2 + \sqrt{x^4 + 1}} - \sqrt{2} x \right] = $

  • A
    $0$
  • B
    $1$
  • C
    $\frac{1}{4 \sqrt{2}}$
  • D
    $\frac{3}{2 \sqrt{2}}$

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