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: Surgery
[{'content': "Transmural inflammation with skip lesions in colon are characteristic of - \nSelect and explain. \nA. Regional ileitis (Crohn's disease), B. Ischemic colitis, C. Ulcerative colitis, D. Non specific colitis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]