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
The division of a single tooth resulting in one normal and one supernumerary tooth is known as 
Select and explain. 
A. Gemination., B. Fusion., C. Twinning., D. Concrescence.
C: Twinning.
Answer: C: Twinning. 
Explanation: None