Let $f: R \rightarrow R$ be a continuous function. If $px+my+n=0$ is a tangent drawn to the curve $y=f(x)$ at $x=\alpha$,then at $x=0$,$\frac{d}{d x}\left(f\left(\alpha e^{2 x}\right)\right)=$

  • A
    $0$
  • B
    $\frac{p}{m}$
  • C
    $\frac{-2 \alpha m}{p}$
  • D
    $\frac{-2 p \alpha}{m}$

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