This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Skin
[{'content': 'Subepidermal lesions are seen in \nSelect and explain. \nA. Pemphigus vulgaris, B. Pemphigoid bullae, C. Burns, D. Bullous impetigo', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans: (b) Pemphigoid bullaeHarrison 19th ed. / 371-72* Pemphigus has intraepidermal bullae* Pemphigoid has subepidermal bullaeDifference between Pemphigus and Pemphigoid BullaeFeaturesPemphigusPemphigoid* Row of Tomb stonePresentAbsent* Nikolsky SignPresentAbsent* Bullae locationIntraepidermal - flaccid BullaeSubepidermal & tense Bullae* Mucosa involvementPresent (common)Absent or less common* AcantholysisPresentAbsent* PrognosisPoorGood', 'role': 'assistant'}]