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 functional implant, bone loss seen annually after 1 year is: 
Select and explain. 
A. 1.5 to 2 mm, B. Less than 0.1 mm, C. 1 to 2 mm, D. 1 to 1.5 mm
B: Less than 0.1 mm
Answer: B: Less than 0.1 mm 
Explanation: None