This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Surgery
[{'content': 'Annual risk of having breast cancer by mammography is \nSelect and explain. \nA. 1%, B. 0.01%, C. 2%, D. 2.50%', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (A) 1%', 'role': 'assistant'}]