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: Pathology
Caries on the enamel surface leads to accentuation of: 
Select and explain. 
A. Incremental lines of Retzius, B. Mineralization, C. Demineralization, D. None
A: Incremental lines of Retzius
Answer: A: Incremental lines of Retzius 
Explanation: A change in early enamel caries is the accentuation of the incremental lines of Retzius. This conspicuous appearance of the calcification lines is an optical phenomenon due to loss of minerals, which causes the organic structures to appear more prominent. There may also be accentuation of perikymata which are the external manifestation of striae of Retzius. 
Ref: Shafer's textbook of oral pathology 7th edition page 447