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
If 2 Implants of size 4 mm are to be placed in a ridge, what should be the minimum width required in the ridge 
Select and explain. 
A. 14 mm, B. 15 mm, C. 17 mm, D. 18 mm
A: 14 mm
Answer: A: 14 mm 
Explanation: None