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': "Yellowish exudates at multiple sites seen in colonoscopy indicates - \nSelect and explain. \nA. Crohn's disease, B. Hirschsprung disease, C. Tuberculosis, D. Lymphoma", 'role': 'user'}, {'content': "Answer: A \nExplanation: In Crohn's disease focal inflammation and ulceration are frequently seen.\nIn ulcerative colitis usually hyperemia is seen.", 'role': 'assistant'}]