This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tumors, Subject name: Anatomy
[{'content': 'In which of the following conditions polyostotic lesions are not seen \nSelect and explain. \nA. Hemangioma, B. Osteoid osteoma, C. Fibrous dysplasia, D. Multiple myeloma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Multiple tumors are Fibrous dysplasia GCT Osteochondroma Enchondroma Hemangioma Multiple myeloma Refer clinical imaging by Denis Marchiori 1112p', 'role': 'assistant'}]