This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'Extremely pruritic excoriation and papules on buttocks with autoantibodies against epidermal transglutaminase and IgA deposition in dermis on immunohistological examination of normal perilesional skin. Diagnosis is? NOT RELATED- DERMATOLOGY \nSelect and explain. \nA. Pemphigus vulgaris, B. Pemphigoid, C. Linear IgA disease, D. Dermatitis herpetiformis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: .', 'role': 'assistant'}]