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': 'Nasopharyngeal fibroma is made up of vascular and fibrous tissues. It is: \nSelect and explain. \nA. A nasal polyp, B. Benign lesion, C. Locally malignant benign lesion, D. Highly malignant lesion', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Nasopharyngeal fibroma (Juvenile nasopharyngeal angiofibroma) is a benign tumor but locally invasive and destroys the adjoining structures. It may extend into, Nasal cavity Paranasal sinuses Pterygomaxillary fossa, infratemporal fossa and cheek Orbits Cranial cavity', 'role': 'assistant'}]