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': 'Cold spot is seen in all the following except: \nSelect and explain. \nA. Fibrous Cortical defect, B. Pseudarthrosis, C. Multiple myeloma, D. Eosinophilic granuloma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Eosinophilic granuloma - shows osteoblastic activity - hotspot.', 'role': 'assistant'}]