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
FISCH classification is used for: 
Select and explain. 
A. Juvenile nasopharyngeal angiofibroma, B. Nasopharyngeal ca, C. Vestibular schwannoma, D. Glomus tumour
D: Glomus tumour
Answer: D: Glomus tumour 
Explanation: A classification system (A-D) describing glomus tumors based on anatomic location and size, with larger lettering representing more extensive tumors.