This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skin, Subject name: Pathology
[{'content': "'Row of tombstones' appearance is seen in: \nSelect and explain. \nA. Irritant dermatitis, B. Pemphigus, C. Pemphigoid, D. Herpes zoster", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Pemphigus(Ref: Robbins 9th/pg 1167)DiseaseBiopsy featuresDIFPemphigus vulgaris* Suprabasal acantholytic vesicle (tombstone pattern) Q* Mixed perivascular infiltrate with eosinophils QIgG within suprabasal intercellular spaces-fishnet pattern Q', 'role': 'assistant'}]