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: Radiology
[{'content': 'Investigation of choice for juvenile nasoangiofibroma \nSelect and explain. \nA. X-ray, B. Angiography, C. USG, D. CT Scan – contrast enhanced', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Contrast CT is the investigation of choice as extent of the tumor can be seen.', 'role': 'assistant'}]