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': 'Fusion of teeth is more common in \nSelect and explain. \nA. Primary dentition, B. Permanent dentition, C. Mixed dentition, D. None of the above.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]