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: 1. Pyrimidine 2. Histone 3. Sugar 4. Purine 5. Phosphate \nSelect and explain. \nA. 1,2 & 3, B. 1,3 & 4, C. 1,3 & 5, D. 2,3 & 4', 'role': 'user'}, {'content': 'Answer: B \nExplanation: "The nucleoside is composed of purine purine or pyrimidine base linked to either D-ribose (in RNA) or D-2- deoxyribose (in DNA)" "The nuclear DNA is found bounded to basic proteins called histones". Nucleotides Nucleotides are nucleoside +P The Phosphodiester bond between the nucleotides is formed mainly between 3\'OH group of sugar of one nucleotide to 3\'OH group of sugar of another nucleotide. Ref: Harper 27/e, Page 297; Chatterjee & shinde 7/e, Page 206-07.', 'role': 'assistant'}]