If $f(x) = x + \tan x$ and $g(x)$ is the inverse of $f(x)$,then $g'(x)$ is equal to

  • A
    $\frac{1}{1 + (g(x) - x)^2}$
  • B
    $\frac{1}{2 + (g(x) + x)^2}$
  • C
    $\frac{1}{2 + (g(x) - x)^2}$
  • D
    None of these

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