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': 'The most popular articulator of class 3B is: \nSelect and explain. \nA. Trubyte articulator., B. Hanau model., C. Monsoon articulator., D. All of the above.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Class II B -\xa0Monsoon’s\xa0instrument\nClass lIl A - 1.\xa0Hanau\xa0model—H non arcon mace\n\n2.\xa0Hanau\xa0model—H2 arcon mode\n\nClass III B - Trubyte articulator\nClass IV B - Pantronic', 'role': 'assistant'}]