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': 'Which one of the following is the preferred route for performing cerebral angiography: March 2009 \nSelect and explain. \nA. Transfemoral route, B. Transbrachial route, C. Transradial route, D. Transaxillary route', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A: Transfemoral Route Transfemoral route is the preferred route for cerebral angiography.', 'role': 'assistant'}]