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: Pathology
[{'content': "Transmural involvement & granuloma are seen in - \nSelect and explain. \nA. Ulcerative coilitis, B. Crohn's disease, C. Tropical sprue, D. Amoebic colitis", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]