This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Major site of protein glycosylation is ? \nSelect and explain. \nA. ER and golgi body, B. Ribosome and golgi body, C. ER and ribosome, D. Ribosome and cytoplasm', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., ER and golgi body N- Glycosylation occurs in ER and O-glycosylation occurs in golgi apparatus.", 'role': 'assistant'}]