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': 'In DNA structure, maximum number of bonds are seen amongst which of the following pair: \nSelect and explain. \nA. A-T, B. G-C, C. A-G, D. C-T', 'role': 'user'}, {'content': 'Answer: B \nExplanation: DNA is a double-stranded molecule twisted into a helix (think of a spiral staircase).Each spiraling strand, comprised of a sugar-phosphate backbone and attached bases, is connected to a complementary strand by non-covalent hydrogen bonding between paired bases.The bases are adenine (A), thymine (T), cytosine (C) and guanine (G).A and T are connected by two hydrogen bonds. G and C are connected by three hydrogen bonds.', 'role': 'assistant'}]