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
Fusion of two adjacent teeth by their cementum is called as 
Select and explain. 
A. Fusion, B. Gemination, C. Concrescence, D. None of the above
C: Concrescence
Answer: C: Concrescence 
Explanation: None