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': 'Which of the following aminoacids in a protein commonly acts as a potential 0-Glycosylation site for attachment of an oligosaccharide unit: \nSelect and explain. \nA. Glutamine, B. Cysteine, C. Serine, D. Asparginine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Serine', 'role': 'assistant'}]