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: ENT
[{'content': 'FISCH classification is used for: \nSelect and explain. \nA. Juvenile nasopharyngeal angiofibroma, B. Nasopharyngeal ca, C. Vestibular schwannoma, D. Glomus tumour', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A classification system (A-D) describing glomus tumors based on anatomic location and size, with larger lettering representing more extensive tumors.', 'role': 'assistant'}]