The correct option is C C
The cross section of primary dicot stem shows central pith (D) surrounded by vascular bundles (C) arranged in broken rings. The xylem (A) is present towards the center of the stem while phloem (B) lies towards the periphery. Xylem and phloem are separated by vascular cambium. The region lying next to outer most boundary represents cortex (E) that consists of an outer zone of collenchyma and an inner zone of parenchyma cells. Thus, the correct answer is C.