For the equation $$\frac{d^{3}y}{dx^{3}} + x \left ( \frac{dy}{dx} \right )^{\frac{3}{2}}+ x^{2}y=0$$ the correct description is

- an ordinary differential equation of order $3$ and degree $2$
- an ordinary differential equation of order $3$ and degree $3$
- an ordinary differential equation of order $2$ and degree $3$
- an ordinary differential equation of order $3$ and degree $\frac{3}{2}$