A charged shell of radius R carries a total charge Q. Given $$\phi$$ as the flux of electric field through a closed cylindrical surface of height h, radius r and with its center same as that of the shell. Here, center of the cylinder is a point on the axis of the cylinder which is equidistant from its top and bottom surfaces. Which of the following option(s) is/are correct?
[$$\epsilon_0$$ is the permittivity of free space]