If $\int \frac{\sqrt{x}}{x(x+1)} dx = k \tan^{-1} m + c$,(where $c$ is the constant of integration),then:

  • A
    $k=1, m=\sqrt{x}$
  • B
    $k=2, m=\sqrt{x}$
  • C
    $k=1, m=x$
  • D
    $k=2, m=x$

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