During the growth of a dicot from embryo to woody stage, A is the first formed meristem and B is the last formed meristem. A and B are respectively

In woody dicot the sequence of appearance of various meristems during the growth development are Apical meristems seen even at embryonal stage and in later stages Intercalary meristem, Fascicular cambium, Interfascicular cambium and Cork cambium appear in a sequence.