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: Dental
[{'content': 'All of the following are bullous lesions except - \nSelect and explain. \nA. Pemphigus vulgaris, B. Dermatitis herpetiformis, C. Atopic dermatitis, D. Pemphigoid', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Primary blistering disorder\n\nIntraepidermal → Pemphigus vulgaris, P. foliaceous, P. vegetans, P. erythematosus.\nSubepidermal → Bullous pemphigoid, Dermatitis herpe4formis, Epidermolysis bullosa acquisita.', 'role': 'assistant'}]