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
After dentinogenesis nutrition of ameloblast is derived from 
Select and explain. 
A. Stellate reticulum, B. Dental Papilla, C. Dental sac, D. None of the above
C: Dental sac
Answer: C: Dental sac 
Explanation: None