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': 'Nucleoside is made up of: \nSelect and explain. \nA. Pyrimidine, B. Purine, C. Sugar, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A, B, C i.e. Pyrimidine, Sugar, Purine', 'role': 'assistant'}]