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: Pathology
[{'content': 'Ameloblastoma most frequently occurs in \nSelect and explain. \nA. Mandibular molar region, B. Maxillary molar region, C. Mandibular premolar region, D. Maxillary premolar region', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]