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: Surgery
All of the following show compression osteosynthesis except: 
Select and explain. 
A. Dynamic compression plates., B. Champys mini plates., C. Eccentric compression plates., D. Lag screw.
B: Champys mini plates.
Answer: B: Champys mini plates. 
Explanation: None