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': 'How to differentiate between bony neoplasm and cyst, Radiographically: \nSelect and explain. \nA. By their sizes., B. By their shapes., C. By peripheral bone formation., D. By their location.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]