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
Odontoblast is derived from 
Select and explain. 
A. Mesenchimal cell of Dental Papilla, B. Inner enamel epithelium, C. Outer enamel epithelium, D. All of the above
A: Mesenchimal cell of Dental Papilla
Answer: A: Mesenchimal cell of Dental Papilla 
Explanation: None