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
Nasopharyngeal fibroma is made up of vascular and fibrous tissues. It is: 
Select and explain. 
A. A nasal polyp, B. Benign lesion, C. Locally malignant benign lesion, D. Highly malignant lesion
C: Locally malignant benign lesion
Answer: C: Locally malignant benign lesion 
Explanation: 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