Which of the following is the largest single membrane-bound intracellular compartment? a) Ribosome b) Golgi apparatus c) Nucleus d) Endoplasmic reticulum

Dear student,
Endoplasmic reticulum is the largest membrane-bound intracellular component of the cell. 
It has a surface area of about 30 time of the plasma membrane. 
Option d is correct.

Regards