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
In a class II cavity in an incisor the retentive points are placed: 
Select and explain. 
A. At the DEJ, B. In the dentin, C. In the axial wall, D. Never on labial or Lingual walls
B: In the dentin
Answer: B: In the dentin 
Explanation: None