This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper Extremity, Subject name: Anatomy
[{'content': "A 56-year-old woman visits the emergency department after falling on wet pavement. Radiographic examination reveals osteoporosis and a Colles' fracture. Which of the following carpal bones are often fractured or dislocated with a Colles' fracture? \nSelect and explain. \nA. Triquetrum and scaphoid, B. Triquetrum and lunate, C. Scaphoid and lunate, D. Triquetrum, lunate, and scaphoid", 'role': 'user'}, {'content': "Answer: C \nExplanation: The scaphoid and lunate carpal bones are in closest articulation with the radius, which is fractured in a Colles' fracture; therefore, they would most likely be disrupted or fractured. The other carpal bones listed do not have direct contact with the radius and have a more distal location; therefore, they would not be as likely to be injured with a Colles' fracture.", 'role': 'assistant'}]