Let $l = \mathop {\lim}\limits_{x \to 0} \frac{[x]^2}{x^2}$ and $m = \mathop {\lim}\limits_{x \to 0} \frac{[x^2]}{x^2}$,where $[ \cdot ]$ denotes the greatest integer function. Then:

  • A
    $l$ exists but $m$ does not
  • B
    $m$ exists but $l$ does not
  • C
    $l$ and $m$ both exist
  • D
    neither $l$ nor $m$ exists

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