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
Incremental lines of Retzius appear 
Select and explain. 
A. As lines in the enamel running at right angles to the enamel surface, B. As lines in the dentin running at right angles to the dentino-enamel junction, C. In enamel and follow the apposition pattern, D. In dentin and follow the appositional pattern
C: In enamel and follow the apposition pattern
Answer: C: In enamel and follow the apposition pattern 
Explanation: None