This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Osteology, Subject name: Anatomy
[{'content': 'Which joint is involved in side to side movement (to look right and left) \nSelect and explain. \nA. Atlanto-occipital joint, B. Atlanto-axial joint, C. C2-C3 aiculation, D. C6-C7 aiculation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Side to side movement is due to the C1 - C2 joint called atlanto-axial joint. Atlas is C1 bone, Axis is C2 bone,the Dens of C2 is going to fit into the atlas bone forming ATLANTO-AXIAL JOINT Atlanto-occipital joint (Ellipsoidal synol joint)causes yes movement / nodding movement. Movement at Atlanto-occipital joint:', 'role': 'assistant'}]