This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': "A non-caseating granuloma is seen in? \nSelect and explain. \nA. Tropical sprue, B. Celiac sprue, C. Ulcerative colitis, D. Crohn's disease", 'role': 'user'}, {'content': 'Answer: D \nExplanation: granuloma- distinctive type of chronic inflammation characterized by microscopic aggregation of activated macrophages (epithelioid cells) with scattered lymphocytes sometimes granulomas are associated with central necrosis caseating granuloma tuberculosis histoplasmosis non-caseating granulomas have no necrotic center Crohns disease sarcoidosis foreign body reactions leprosy ref Robbins 9/e p 98', 'role': 'assistant'}]