This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blistering disorders, Subject name: Dental
[{'content': 'Arrange superficial to deep disease : A) Pemphigus vulgarisB) Linear IgAC) Bullous pemphigoidD) Epidermolysis bullosa dystrophica \nSelect and explain. \nA. D>A>C>B, B. C>A>D>B, C. A>C>B>D, D. D>A>B>C', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Disease Involvement of Layer A) P.Vulgaris Dsg 3 > Dsg 1 Epidermis B) B.Pemphigoid BPAg2 > BPAg1 Upper poion BM C) Linear lgA BPAg2 > BPAg1 Upper BM Salt split Layer (Lamina lucidosis) D) E.B.D(Epidermolysis bullosa Dystrophica) Collagen 7 Lower BM', 'role': 'assistant'}]