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 associated with pre-eruptive enamel hypoplasia: 
Select and explain. 
A. Secondary caries., B. Chronic caries., C. Occult caries., D. Incipient caries.
C: Occult caries.
Answer: C: Occult caries. 
Explanation: None