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': 'Nucleic acid absorbs light at wavelength of 260 mm due to \nSelect and explain. \nA. Proteins, B. Ribose, C. Purines & Pyrimidines, D. Deoxyribose', 'role': 'user'}, {'content': 'Answer: C \nExplanation: DNA bases (purines and pyrimidines) absorb UV light of 260 nm.', 'role': 'assistant'}]