Let $f: R-\{2\} \rightarrow R-\{1\}$ defined by $f(x)=\frac{x-3}{x-2}$ and $g: R \rightarrow R$ defined by $g(x)=3x-2$. Then,the sum of all values of $x$ for which $f^{-1}(x)+g^{-1}(x)=\frac{19}{6}$ is

  • A
    $\frac{5}{2}$
  • B
    $\frac{7}{2}$
  • C
    $\frac{9}{2}$
  • D
    $\frac{11}{2}$

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