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: Medicine
[{'content': 'A patient presents with chronic small bowel diarrhea, duodenal biopsy shows villous atrophy. Anti-endomysial antibodies and IgA TTG antibodies are positive. What is the treatment of choice? \nSelect and explain. \nA. Gluten free diet, B. Antibiotics, C. Loperamide, D. 5-ASA', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]