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 distance between implant and adjustment tooth should be at least 
Select and explain. 
A. 7 mm, B. 1.5 mm, C. 3.5 mm, D. 3.75 mm
B: 1.5 mm
Answer: B: 1.5 mm 
Explanation: None