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
An attempt of division of a single tooth before calcification, resulting in incomplete formation of two teeth is called 
Select and explain. 
A. Gemination, B. Twinning, C. Concrescence, D. Fusion
A: Gemination
Answer: A: Gemination 
Explanation: None