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: Orthopaedics
[{'content': 'Left-Right movement of skull occurs at: \nSelect and explain. \nA. Atlanto-occipital joint, B. Atlanto-axial joint, C. C2-C3, D. C6-C7', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (b) Atlanto-axial jointYes movement occurs at atlanto-occipital joint and No movement occurs at atlanto-axial joint.', 'role': 'assistant'}]