For graphene nanoribbons with armchair edges the selection rule is formula_7. Similar to tubes transitions intersubband transitions are forbidden for armchair graphene nanoribbons. Despite different selection rules in single wall armchair carbon nanotubes and zigzag graphene nanoribbons a hidden correlation of the absorption peaks is predicted. The correlation of the absorption peaks in tubes and ribbons should take place when the number of atoms in the tube unit cell formula_8 is related to the number of atoms in the zigzag ribbon unit cell formula_9 as follows: formula_10, which is so-called matching condition for the periodic and hard wall boundary conditions. The aforementioned results were obtained within the nearest-neighbor approximation of the tight-binding model neglecting the excitonic effects.