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: Anatomy
[{'content': 'The joint that permits nodding of head while saying yes is: \nSelect and explain. \nA. Atlanto-axial joint, B. Atlanto-occipital joint, C. C2- C3 joint, D. C3- C4 joint', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Atlanto-occipital joint is a synol between skull and C1 veebrae. It permits nodding of head such as flexison and extension (YES movement) and lateral flexion. Atlanto-axial joint is a pivot joint between C1 and C 2 veebrae. It permits rotation of head that is side to side movement (NO movement). Ref: Keith moore clinical anatomy, 4th Edition, Page 459.', 'role': 'assistant'}]