Governing differential equation for small deflections of elastic beamsis given by

A

$$\frac{\partial^2 y}{\partial x^2} = \frac{M}{EI}$$

B

$$EI\frac{\partial^3 y}{\partial x^3} = V(x)$$

C

$$EI\frac{\partial^4 y}{\partial x^4} = q(x)$$

D

All the above