This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Medicine
[{'content': 'Drug used in acute exacerbation of ulcerative colitis is \nSelect and explain. \nA. Sulfasalazine, B. Steroids, C. Infliximab, D. Cyclosporine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Cyclosporine is used for acute exacerbation of ulcerative colitis, and also as rescue therapy to prevent surgery in ulcerative colitis responding poorly to glucocoicoids. Reference : Davidson, 23rd Edition, page no : 821.', 'role': 'assistant'}]