Derivative of Rational Radical Function

Which of the following functions is the derivative of the function $f(x)=\frac{1-2x}{\sqrt{2x}}$? (A) $f'(x)=\frac{-\sqrt{2x}(2x-1)}{4x^2}$ (B) $f'(x)=\frac{-\sqrt{2x}(2x-1)}{8x^2}$ (C) $f'(x)=\frac{-\sqrt{2x}(2x+1)}{4x^2}$ (D) $f'(x)=\frac{-\sqrt{2x}(2x+1)}{8x^2}$ (E) $f'(x)=\frac{-\sqrt{2x}(1-2x)}{4x^2}$