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: Orthopaedics
As per Anderson and D'Alonzo classification the most dangerous type of odontoid fracture is 
Select and explain. 
A. Type I, B. Type II, C. Type III, D. Type IV
B: Type II
Answer: B: Type II 
Explanation: Anderson and D'Alonzo classification for odontoid fracture 
Type I : Avulsion of tip .
Type II : Fracture at junction of odontoid process and axis.
Type III : Fracture through the body of axis.
Treatment according to classification 
Type I : Conservatively
Type II : Most dangerous type, treated with screw fixation
Type III : Conservatively