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': 'BIRAD-4 means the breast lump is \nSelect and explain. \nA. Benign, B. Probably benign, C. Suspicious of malignancy, D. Malignant', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer-C. Suspicious of malignancyTo assist in risk stratification, the American College of Radiology has developed a Breast Imaging Repoing and Data System (BIRADS) to standardize the criteria by which mamographic abnormalities are graded.The BIRADS score is provided to guide the surgeon toward the likelihood of malignancy. Scores of 4 or 5 warrant biopsy.', 'role': 'assistant'}]