Let $f(x) = \sqrt{\frac{x}{1-x}} + \sqrt{\frac{1-x}{x}}$. If $\lim_{x \rightarrow m} f(x) = 5/2$,then the set of all possible finite values of $m$ is:

  • A
    $\{0, 1\}$
  • B
    $\{0, 1/3, 2/3\}$
  • C
    $\{1/5, 4/5\}$
  • D
    $\{1/4, 3/4\}$

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