This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'A 28-year-old woman with diabetes presents with lesions on her leg. They are not painful, and have a central depression and raised irregular margin. Which of the following is the most likely diagnosis? \nSelect and explain. \nA. eruptive xanthomas, B. necrobiosis lipoidica diabeticorum, C. gangrene, D. staphylococcal infection', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (b) Source: (Kasper, p. 2169)This lesion is more frequent in females and may antedate other clinical signs and symptoms of diabetes. The plaques are round, firm, and reddish-brown to yellow in color. They most commonly involve the legs but can also involve the hands, arms, abdomen, and head.', 'role': 'assistant'}]