This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ohopedics Oncology, Subject name: Orthopaedics
[{'content': 'In which of the following multiple lesions are not seen? \nSelect and explain. \nA. Enchondroma, B. Osteoid osteoma, C. Fibrous dysplasia, D. GCT', 'role': 'user'}, {'content': "Answer: B \nExplanation: Osteoid osteoma: Zone of sclerosis surrounding a radiolucent pa is seen POLYOSTOTIC BONE LESIONS Fibrous dysplasia Enchondroma Osteochondroma Ewing's sarcoma Giant cell tumor (Goltz syndrome) Metastasis Multiple myeloma Bone infarction Osteomyelitis", 'role': 'assistant'}]