The area (in square units) bonded by the curves $y^2=4x$ and $x^2=4y$ in the plane is :

Question

$$\begin {array} {1 1} (a)\;\frac{8}{3} & \quad (b)\;\frac{16}{3} \\ (c)\;\frac{32}{3} & \quad (d)\;\frac{64}{3} \end {array}$$