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
Gingivally the depth of a class V cavity is 
Select and explain. 
A. 0.5 — 1 mm, B. 0.75 — 1mm, C. 1-1.25mm, D. 2-3mm
B: 0.75 — 1mm
Answer: B: 0.75 — 1mm 
Explanation: None