This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autoimmune Skin Disorders, Subject name: Skin
[{'content': 'Gluten free diet is beneficial in: \nSelect and explain. \nA. Psoriasis, B. Exfoliatrive dermatitis, C. Dermatitis herpetiformis, D. Pemphigoid', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans is 'c' i.e, Dermatitis herpetiformis", 'role': 'assistant'}]