This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vestibulobullous disorders, Subject name: Dental
[{'content': 'Flaccid bullae with mucosal involvement and intraepidermal acantholysis are characteristic of \nSelect and explain. \nA. Pemphygus vulgaris, B. Pemphigus foliaceous, C. Psoriasis, D. Vitiligo', 'role': 'user'}, {'content': "Answer: A \nExplanation: In pemphigus vulgaris skin involvement stas in the form of flaccid blisters. Cutaneous lesions are usually preceded by blisters and erosions of oral mucosa.HP shows a suprabasal cleft with bulla formation just above the basal layer with a tomb stone appearance and with blister cavity containing acantholytic cells and inflammatory cells.Page no 280,282. Reference IADVL's concise textbook of dermatology", 'role': 'assistant'}]