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': "The presence of anti-Saccharamyces cerevisae antibody is a surrogate marker of one of the following - \nSelect and explain. \nA. Celiac disease, B. Crohn's disease, C. Ulcerative colitis, D. Tropical sprue", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]