This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
[{'content': 'All of the following are true about dermatitis herpetiformis except: \nSelect and explain. \nA. Severe itchy skin lesions over extensor surfaces, B. Most of the patients have underlying coeliac disease, C. It is characterized by IgE anitbodies against TTG : Tissue transglutaminase, D. Dapsone is the drug of choice', 'role': 'user'}, {'content': 'Answer: C \nExplanation: IgA antibodies are seen against TTG.', 'role': 'assistant'}]