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
The axiopulpal depth of the proximal box in class II cavity is 
Select and explain. 
A. 0.2 to 0.8mm, B. 0.5 to 1mm, C. 1 to 2mm, D. 2 to 3mm
A: 0.2 to 0.8mm
Answer: A: 0.2 to 0.8mm 
Explanation: None