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
Hertwig's root sheath is formed from 
Select and explain. 
A. Stratum inter medium, B. Stellate reticulum, C. Outer enamel epithelium, D. Cervical loop/ Enamel Organ
D: Cervical loop/ Enamel Organ
Answer: D: Cervical loop/ Enamel Organ 
Explanation: None