This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Pathology
[{'content': 'A 50 year old male presented with recurrent bloody diarrhea. Colonoscopy showed geographical ulcers. Histopathology is shown below. What is your diagnosis? \nSelect and explain. \nA. Pseudomebranous colitis, B. Non-hodgkin lymphoma colon, C. Adenocarcinoma colon, D. Crohn disease', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) Crohn disease(Ref: R 9/ 798)The picture shows - transmural inflammation (blue part) and a overlying ulcer. The best option here is Crohns disease.', 'role': 'assistant'}]