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
Enamel lamellae 
Select and explain. 
A. Elevation on outer surface of enamel, B. Dentinal tubule in enamel, C. Uniform arrangement of enamel rods, D. Enamel projection in dentin
D: Enamel projection in dentin
Answer: D: Enamel projection in dentin 
Explanation: None