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': 'Intra–epidermal vesicles are seen in – a) Pemphigus vulgarisb) Carcinomatous pemphigusc) Dermatitis herpetiformisd) Congenital epidermolysis bullosae) Trauma \nSelect and explain. \nA. ac, B. bd, C. ab, D. bce', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pemphigus vulgaris and carcinomatous pemphigus (Pemphigus foliaceous) cause intraepidermal bullae.', 'role': 'assistant'}]