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
All are true about Jafferson's fracture except 
Select and explain. 
A. Fracture of C1  vertebrae, B. Vertical compression fracture, C. Less common type of fracture of C1  vertebrae, D. Has 50% association of concomitant injury in cervical spine elsewhere
C: Less common type of fracture of C1  vertebrae
Answer: C: Less common type of fracture of C1  vertebrae 
Explanation: Jafferson's fracture is most common fracture of Atlas (C1) vertebrae.