This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Spinal injuries, Subject name: Anatomy
Jafferson's fracture is the fracture of- 
Select and explain. 
A. Odontoid, B. C1, C. C2, D. C3
B: C1
Answer: B: C1 
Explanation: *Jefferson's fracture is the most common type of fracture of atlas(1) Ref: Apley's 9th/e p.813,814