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: Surgery
[{'content': 'Ivor Lewis operation is done for \nSelect and explain. \nA. Carcinoma oesophagus, B. Achalasia cardia, C. Hiatus hernia, D. GERD', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In carcinoma surgery alone is best suited to patients with disease confined to the oesophagus (T1b, T2)The most widely practiced oesophagotomy approach is the two-phase Ivor Lewis operation, especially distal tumors.Three-phase oesophagectomy (McKeown) may be more appropriate for more proximal tumours in order to achieve better longitudinal clearance,Ref: Bailey and Love 27e pg: 1092', 'role': 'assistant'}]