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': 'To look right & left which type of joint is involved \nSelect and explain. \nA. Ellipsoid joint, B. Pivot joint, C. Saddle joint, D. Hinge joint', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans: B. Pivot jointRight to left movement occurs at atlanto-axial joint which is a pivot joint.', 'role': 'assistant'}]