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: Radiology
The region in the crown of a tooth is often mistaken for caries in the intraoral periapical radiograph: 
Select and explain. 
A. CEJ, B. Dentinoenamel junction, C. Pulp Horn, D. Secondary dentin
A: CEJ
Answer: A: CEJ 
Explanation: None