This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb, Subject name: Anatomy
[{'content': 'All the pairs about the joints of the upper limb are true except \nSelect and explain. \nA. Acromioclavicular joint - Plane synol joint, B. Shoulder joint - Ball and socket joint, C. Sternoclavicular joint - Hinge joint, D. Intercarpal and midcarpal joint - Plane synol joint', 'role': 'user'}, {'content': "Answer: C \nExplanation: The sternoclavicular joint is a synol sellar joint It is the only skeletal aiculation between the upper limb and the axial skeleton. Ref : Gray's Anatomy The Anatomical Basics of Clinical Practice 41 e pg 808.", 'role': 'assistant'}]