This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
[{'content': 'Teeth affected by radiation hazard show: \nSelect and explain. \nA. Occlusal caries, B. Proximal caries, C. Chronic caries, D. Rampant caries', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]