Four rods, $A$, $B$, $C$ and $D$ of the same length and material but of different radii $r , r\sqrt{2},r\sqrt{3}$ and $2r$ respectively are held between two rigid walls. The temperature of all rods is increased through the same range. If the rods do not bend, then

the stress in the rods $A$,$B$, $C$ and $D$ are in the ratio $1:2:3:4$

the forces on them exerted by the wall are in the ratio $1:2:3:4$

the energy stored in the rods due to elasticity are in the ratio $1:2:3:4$

the strains produced in the rods are in the ratio $1:2:3:4$