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 a mandibular major\nconnector \nSelect and explain. \nA. Lingual plate, B. Lingual bar, C. Lingual arch, D. Labial bar', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]