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': 'Most of the failures of replanted tooth are due to \nSelect and explain. \nA. Replacement resorption, B. Surface resorption, C. External resorption, D. Internal resorption', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]