Answer:
a. rough endoplasmic reticulum, Golgi apparatus, released from the cell
Step-by-step explanation:
In an eukaryotic cell, the rough endoplasmic reticulum RER is a part of a continous membrane organelle within the cytoplasm who pricncipal role is synthesis of protein. So, the RER typically functions as protein synthesis
Also, the RER is located nearer to the Golgi Apparatus. The function of this Golgi Appparatus is to modify, package and transport these synthesized protein for delivery to their targeted destination where they will be of use (i.e released from the cell)