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': 'Pisiform bone aiculates with \nSelect and explain. \nA. Triquetral, B. Lunate, C. Scaphoid, D. Trapezoid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pisiform aiculates only with Triquetral. Triquetral aiculates with Pisiform, lunate, hamate and aicular disc of Inferior radioulnar joint. B D Chaurasia 7th edition Page no: 27', 'role': 'assistant'}]