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': 'The division of a single tooth resulting in one normal and one supernumerary tooth is known as \nSelect and explain. \nA. Gemination., B. Fusion., C. Twinning., D. Concrescence.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]