Form the differential equation for the family of curves $y = a \sin(x+b)$ where $a \;and \; b$ are parameters

Question

$(A)\; \frac{d^2y}{dx^2} - y = 0$
$(B)\; \frac{d^2y}{dx^2} + y = 0$
$(C)\; \frac{dy}{dx} - y = 0$
$(D)\; \frac{dy}{dx} + y = 0$