This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inflammatory Bowel Diseases, Subject name: Medicine
[{'content': "Drug of choice for acute exacerbation of ulcerative colitis is? \nSelect and explain. \nA. Sulfasalazine, B. Mesalazine, C. Steroids, D. NSAID's", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. (c) SteroidsRef: Harrison's 18/e, chapter 295", 'role': 'assistant'}]