This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Joints, Subject name: Anatomy
[{'content': '1st carpometacarpal joint is a ty pe of - \nSelect and explain. \nA. Ellipsoid, B. Saddle, C. Condylar, D. Ball and socket', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e.. Saddle Joints of upper extrimitvName of jointType of jointSternoclavicularAcromioclavicularShoulderElbowSuperior radioulnarInferior radioulnarMiddle radioulnarWrist1st carpometacarpalMetacarpophalangealInterphalangealIntercarpal and midcarpatSaddlePlane synovialBall and socketHingePivotPivotSyndesmosisEllipsoidSaddleEllipsoid (functionally)Condylar (Structurally)HingePlane synovial", 'role': 'assistant'}]