If $f(2)=4$ and $f^{\prime}(2)=1$,then $\lim _{x \rightarrow 2} \frac{x f(2)-2 f(x)}{x-2}$ is equal to

  • A
    $-2$
  • B
    $1$
  • C
    $2$
  • D
    $3$

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