This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and Metabolic disorders,Systemic conditions ,Genodermatoses, Connective tissue disorders,Photodermatoses, Subject name: Dental
[{'content': 'Necrobiosis Lipoidica Diabeticorum is most marked on: \nSelect and explain. \nA. Forearms, B. Face, C. Front of legs, D. Back of legs', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Necrobiosis Lipoidica Diabeticorum is an uncommon disorder, accompanying diabetes in predominantly young women. This usually begins in the Pretibial region as an erythematous plaque or papules that gradually enlarge, darken, and develop irregular margins, with atrophic centers and central ulceration. They are often painful. The etiology is microangiopathy.', 'role': 'assistant'}]