This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Spinal Injury, Subject name: Orthopaedics
Jefferson's fracture is: 
Select and explain. 
A. Fracture of Axis, B. Fracture of Atlas, C. Due to fracture of traumatic spondylolisthesis of C2 over C3, D. Avulsion fracture of C7
B: Fracture of Atlas
Answer: B: Fracture of Atlas 
Explanation: Fractures of Spine Jefferson Fracture Burst fracture of C1(ATLAS) Mn: JAT Jefferson-ATlas Avulsion fracture of C7 is known as-Clay shoveller fracture Fracture of pedicle of C2 and spondylolisthesis over C3 is hangmanns fracture.