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': 'Which of the following is not an Arcon type articulator: \nSelect and explain. \nA. Hanau H series articulator, B. Whipmax, C. Teledyne (Class III), D. Ney (Class III)', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]