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': 'Bare orbit is/are seen in – \nSelect and explain. \nA. Metastasis, B. Neuroblastoma, C. Optic nerve glioma, D. Osteomyelitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Bare orbit is seen in neurofibromatosis, metastasis and meningioma.', 'role': 'assistant'}]