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: Surgery
[{'content': 'Mammography is performed in \nSelect and explain. \nA. First half of the menstrual cycle, B. Second half of the menstrual cycle, C. 3rd day, D. 5th day', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Mammography is preferred in first of the menstrual cycle.\nUsually two views are taken craniocaudal and mediolateral oblique.', 'role': 'assistant'}]