This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inflammatory bowel disease, Subject name: Surgery
[{'content': "Hose pipe appearance of intestine is a feature of: \nSelect and explain. \nA. Crohn's disease, B. Malabsorption syndrome, C. Ulcerative colitis, D. Hirschsprung's disease", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Hose-pipe Appearance (Long stricture extending into Ileocecal valve with Thickened wall) - Corresponds to String sign of Kantor', 'role': 'assistant'}]