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: Surgery
[{'content': 'A 40 year old male patient presented with mild abdominal pain, mild constipation with a feeling of incomplete evacuation and mucus in stools for the past 4 years. On examination, tenderness is present in left iliac fossa. The most likely diagnosis is: \nSelect and explain. \nA. Ulcerative colitis, B. Diveicular disease of the colon, C. Irritable bowel syndrome, D. Carcinoma colon', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b. Diveicular disease of the colon', 'role': 'assistant'}]