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': 'Before eruption the position of permanent mandibular incisor buds relative to primary incisors is: \nSelect and explain. \nA. Superior and facial, B. Inferior and facial, C. Superior and lingual, D. Inferior and lingual', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]