If $y=\sqrt{sin x+y}$, then $\Large \frac{dy}{dx}$ is equal to

Question

\[ \begin{array}{1 1}(A)\;\frac{\cos x}{2y-1} & (B)\;\frac{\cos x}{1-2y}\\(C)\;\frac{\sin x}{1-2y} & (D)\;\frac{\sin x}{2y-1}\end{array}\]