Correct Answer - C
The RER offers extensive surface on which protein synthesis can be conveniently carried on by the ribosomes. The proteins formed on ribosomes pass into the ER lumen where they are modified. Then the modified proteins move into the transitional area, where the ER buds off membranous sacs, the transport vesicles, carrying the proteins to the Golgi apparatus. Here, they are further processed and packaged into secretory vesicles for export by exocytosis at the plasma membrane.
