Consider the following physical expressions. (I) $$\rho v^2$$ where $$\rho$$ is density and $$v$$ is velocity.

(II) $$\frac{Y\Delta L}{L}$$ where $$Y$$ is Young's modulus and $$L$$ is length.

(III) $$\frac{\sigma^2}{\varepsilon_0}$$ where $$\sigma$$ is surface density of charge.

(IV) $$h\rho rg$$ where $$h$$ is the rise of a liquid in a capillary tube of radius $$r$$.

The expressions having same dimensional formula are