This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cutaneous Manifestations of Microvascular Occlusion Syndromes, Subject name: Skin
[{'content': 'A person presents with hemorrhagic fluid in tense blister at dermoepidermal junction. Most probable diagnosis is? \nSelect and explain. \nA. Pemphigoid, B. Pemphigus vulgaris, C. Pemphigus vegetans, D. Drug induced pemphigus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ANSWER: (A) PemphigoidREF: Rooks dermatology 7th ed p. 41.3-41.19Intraepidermal BullaBlister at Dertnoepidermal JunctionGranular layerJunctionalPemphigus foliaceousJunctional EBSubcorneal pustular dermatosisBullous pemphigoidStaphylococcal scalded skin syndrome Bullous pemphigoidDermolyticSpinous layerEpidermoiytic bullosa dystrophicansFamilial benign pemphigusEpidermolytic bullosa aquisticaSuprabasalDermatitis herpetiformisPemphigus vulgarisDarier s diseaseBasal layerErythema multiformeLupus erythematosusLichen planusEBSPemphigus vegetans is a localized form of pemphigus vulgarisThe most common variant of pemphigus associated with drug exposure is pemphigus foliaceus, although pemphigus vulgaris has also been described', 'role': 'assistant'}]