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 the only posterior dental cross\nbite? \nSelect and explain. \nA. Maxillary anterior alveolus is overlapped by mandibular anterior alveolus, B. Mandibular posterior jaw segment is displaced to overlap maxillary posterior jaw segment, C. Maxillary posterior dental segment is overlapped by the mandibular posterior teeth, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]