This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Injuries Around the Fore Arm & Wrist, Subject name: Orthopaedics
[{'content': 'Carpal bone which fractures commonly: \nSelect and explain. \nA. Scaphoid, B. Lunate, C. Hamate, D. Pisiform', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: a', 'role': 'assistant'}]