This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vesiculobullous (Blistering) Disorders, Subject name: Skin
[{'content': "A Young boy presents with multiple flaccid bullous lesions over trunk with some oral mucosal lesions. Most likely finding on immunofluorescence study of the biopsy specimen would be: \nSelect and explain. \nA. 'Fishnet' IgG deposits in epidermis, B. Linear IgG in Deposits, C. Linear IgA in dermal papillae, D. Granular IgA in reticular dermis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. \'Fishnet\' IgG deposits in epidermis Pemphigus vulgarisBullous PemphigoidAutoantibodies againstDesmosomal proteinsHemidesmosomal proteinsAge40-60 yrs60-75 yrsInitial siteOral mucosaLower extremitiesBullaeFlaccidTensePruritusMild/-Nonexistent or severeNikolsky\'s sign+-Mucosal involvement+(in almost all patients)- (10-40% only)HPESuprabasal acantholytic blisters (Tombstone appearance)Subepidermal blisters(eosinophil rich dermal infiltrate)DIFIgG & C3 deposits at intercellular substance of epidermis ("Fishnet appearance")IgG, C3, and IgA/IgM at BM zone.IIFCirculating IgG antibodies to intercellular substance of epidermis.Anti-BM zone antibodies IgGRxQSteroids + immunosuppressantsDapsoneGoldSteroidsImmunosuppressantsDapsonePost inflammatory Hyperpigmentation+-', 'role': 'assistant'}]