If $\log (x-y) - \log 5 - \frac{1}{2} \log x - \frac{1}{2} \log y = 0$,then find the value of $\frac{x}{y} + \frac{y}{x}$.

  • A
    $25$
  • B
    $26$
  • C
    $27$
  • D
    $28$

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