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': 'In a mammogram all of the following are features of carcinoma breast EXCEPT- \nSelect and explain. \nA. A solid lesion with ill defined edge or stellate configuration, B. True microcalfication, C. Areas of macrocalcification, D. Increased skin thickness', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]