The formula for the volume of the cylinder is given as
[tex]v=\pi r^2h[/tex]*Here r is the radius
*Here h is the height
The formula for the volume of the cone is given as
[tex]V=\frac{1}{3}\pi r^2h[/tex]The difference of the volume is calculated as
[tex]\begin{gathered} dV=v-V \\ =\pi r^2h-\frac{1}{3}\pi r^2h \\ =\pi r^2h(1-\frac{1}{3}) \\ =\pi r^2h\times(\frac{2}{3}) \end{gathered}[/tex]Thus, the correct order is (A) i.e 3, 2,1