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
Dentin formation begins in 
Select and explain. 
A. Morphogenic stage, B. Organizing stage, C. Terminal phase of organizing stage, D. Terminal phase of formative stage
C: Terminal phase of organizing stage
Answer: C: Terminal phase of organizing stage 
Explanation: None