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': 'Following type of turret (blue and black) are used for? \nSelect and explain. \nA. Forming rectangular arch wire, B. Forming round arch wire, C. Forming square arch wire, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Turret - Blue\nIt is used for forming rectangular arch wires\xa0.016" to .0215".\nTurret - Black\nIt is used for forming rectangular arch wires with torque adjustments:\n0o - 10o\xa0- 16o\xa0- 23o.\nFor use only with wire : .016"\xa0×\xa0.022"', 'role': 'assistant'}]