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: Microbiology
[{'content': 'The drug of choice for an acute exacerbation of ulcerative colitis is \nSelect and explain. \nA. Sulfasalazine, B. Methotrexate, C. Infliximab, D. Coicosteroids', 'role': 'user'}, {'content': 'Answer: D \nExplanation: DOC for acute exacerbation of IBD - SteroidsDOC for maintenance treatment of IBD - Sulfasalazine', 'role': 'assistant'}]