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
Extension of enamel cord to meet the outer enamel epithelium is known as: 
Select and explain. 
A. Enamel knot., B. Enamel cord., C. Enamel septum., D. Enamel navel.
C: Enamel septum.
Answer: C: Enamel septum. 
Explanation: None