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': 'Median atlantoaxial joint is a type of \nSelect and explain. \nA. Coadylar joint, B. Ellipsoid joint, C. Pivot joint, D. Ball and Socket joint', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Median atlantoaxial joint is a type of pivot joint.\nAtlantooccipital joint is an Ellipsoid joint.', 'role': 'assistant'}]