If $\sqrt{x} + \sqrt{y} = \sqrt{xy}$,then $\frac{dy}{dx} = $

  • A
    $-\left(\frac{y}{x}\right)^{\frac{3}{2}}$
  • B
    $\left(\frac{x}{y}\right)^{\frac{3}{2}}$
  • C
    $-\left(\frac{x}{y}\right)^{\frac{3}{2}}$
  • D
    $\left(\frac{y}{x}\right)^{\frac{3}{2}}$

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