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': 'Melting temperature of DNA is directly proportional to \nSelect and explain. \nA. GC Pairing, B. AT Pairing, C. Length of DNA, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: GC pairs have 3 hydrogen bonds and therefore melt at higher temperature compared to AT pairs which have 2 hydrogen bonds.', 'role': 'assistant'}]