Final answer:
Glycoproteins being synthesized for secretion from a cell take the route RER => Golgi complex => secretory vesicles for eventual secretion. Therefore, the correct option is B.
Step-by-step explanation:
When a glycoprotein is being synthesized for secretion from a cell, it is most likely to take the route RER → Golgi complex → secretory vesicles for eventual secretion.
Glycoproteins are synthesized in the rough endoplasmic reticulum (RER), where sugars are covalently attached to the proteins. The modified proteins travel from the RER to the Golgi complex, where further processing and modifications occur. Finally, the proteins are packaged into secretory vesicles and transported to the cell membrane for secretion.