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': 'The most likely cause for suture leak after colon resection and anastomosis for cancer sigmoid is ? \nSelect and explain. \nA. Subclinical malnutrition, B. Infection of anastomotic site, C. Mechanical disruption due to colonic pressure and contractility, D. Ischaemia', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Ischaemia", 'role': 'assistant'}]