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': "Crohn's disease can be seen in: \nSelect and explain. \nA. Jejunum only, B. Colon only, C. Terminal ileum and right side, D. Mouth to anus", 'role': 'user'}, {'content': "Answer: D \nExplanation: CROHN'S DISEASE Chronic, transmural inflammatory disease of the GIT for which the cause is unknown. Can involve any pa of the alimentary tract from the mouth to the anus but most commonly affects the small intestine and colon. Involvement of both large and small intestine :55% Involvement of only small intestine :30% Involvement of only large intestine : 15% In patients with colonic disease, rectal sparing is characteristic", 'role': 'assistant'}]