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': 'Commonest cause for moality in Iver levis operations - \nSelect and explain. \nA. Pulmonary atelectasis, B. Anastomotic leak, C. Thoracic duct fistula, D. Subdiaphragmatic collection', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans is 'b' ie Anastamotic leak Ivor lewis operation - is subtotal esophagectomy done for Ca esophagus in lower third of esophagus. Pa of stomach and esophagus are resected and remnants of both anastomosed. Anastomotic leak is the most logical answer. I have also confirmed it from Senior residents of surgery.", 'role': 'assistant'}]