A solid sphere and a hollow sphere of the same material and size are heated to the same temperature and allowed to cool in the same surroundings. If the temperature difference between the body and that of the surroundings is T, then

both spheres will cool at the same rate for all values of T 

both spheres will cool at the same rate only for small values of T

the hollow sphere will cool at a faster rate for all values of T 

the solid sphere will cool at a faster rate for all values of T