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': 'Which bone is most commonly fractured in the arrow marked area? \nSelect and explain. \nA. Lunate, B. Scaphoid, C. Triquetral, D. Trapezoid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. ScaphoidThe arrow marked structure is anatomical snuff box. Its floor is formed by scaphoid which is a commonly fractured carpal bone.', 'role': 'assistant'}]