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': 'Thermo-stability in DNA is contributed mostly by \nSelect and explain. \nA. A=T, B. G=C, C. Molecular base, D. Parallel arrangement', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Base Composition.More GC pairs more the Tm.', 'role': 'assistant'}]