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
Most of the failures of replanted tooth are due to 
Select and explain. 
A. Replacement resorption, B. Surface resorption, C. External resorption, D. Internal resorption
C: External resorption
Answer: C: External resorption 
Explanation: None