This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: ENT
[{'content': 'Angiofibroma bleeds profusely because: \nSelect and explain. \nA. It has multiple sites of origin, B. It lacks a capsule, C. Vessels lack a contractile component, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Angiofibroma is made of vascular and fibrous tissues vessel are endothelial lined spaces with no elastic or muscle coat vessels lose ability to contract , thus bleed profusely', 'role': 'assistant'}]