<prompt> All the pairs about the joints of the upper limb are true exceptAcromioclavicular joint - Plane synol jointShoulder joint - Ball and socket jointSternoclavicular joint - Hinge jointIntercarpal and midcarpal joint - Plane synol joint  <response>: The sternoclavicular joint is a synol sellar joint It is the only skeletal aiculation between the upper limb and the axial skeleton. Ref : Grays Anatomy The Anatomical Basics of Clinical Practice 41 e pg 808. 