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': 'Expansile lytic lesion with fluid-fluid levels within the metaphysis of fibula seen on CT and MRI in an early adolescent female is typical of – \nSelect and explain. \nA. Giant cell tumor, B. Aneurysmal bone cyst, C. Hemangioma, D. Fibrous dysplasia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Amongst given options, fluid-fluid levels are seen in GCT and ABC.\nLesion in question is metaphyseal:-\n\n\xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 ABC →\xa0 Metaphyseal\n\xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0GCT →\xa0 Epiphyseal\n\nAge of the patient is early adolescent:-\n\n\xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0ABC →\xa0\xa0Before the age of 20 years\n\xa0 \xa0 \xa0 \xa0 \xa0 \xa0 GCT → \xa020 - 40 years\n\nSo, the answer to the question is ABC.', 'role': 'assistant'}]