If $y=2^{\log x}$,then $\frac{d y}{d x}$ is

  • A
    $\frac{2^{\log x}}{\log 2}$
  • B
    $2^{\log x} \cdot \log 2$
  • C
    $\frac{2^{\log x}}{x}$
  • D
    $\frac{2^{\log x} \cdot \log 2}{x}$

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