If $\log _{5} 2, \log _{5}(2^{x}-3)$ and $\log _{5}(\frac{17}{2}+2^{x-1})$ are in $A.P.$,then the value of $x$ is:

  • A
    $0$
  • B
    $-1$
  • C
    $3$
  • D
    $4$

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