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: Dental
[{'content': 'What is the type of wire formed by twisting five tempered wire over a common wire? \nSelect and explain. \nA. Twisted wire, B. Braided wire, C. Axial wire, D. Co-axial wire', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Coaxial Archwire\nCoaxial archwires are made of a central core wire of 0.006 inch diameter wire with 5 or 6 outer wires.\xa0\nThese wires are more flexible and were very frequently used for initial alignment of the teeth before the advent of Ni-Ti wires.\nTextbook of\xa0 Orthodontics Gurkeerat Singh 2nd ed pg no 335', 'role': 'assistant'}]