This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Surgery
[{'content': 'Which of the following operations was first described by Orringer? \nSelect and explain. \nA. En-bloc esophagectomy, B. Transhiatal esophagectomy, C. Thoracoscopic esophagectomy, D. Transthoracic esophagectomy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Double incision: Midline laparotomy followed by cervical incision Cervical anastomosis is done MC procedure done for carcinoma esophagus', 'role': 'assistant'}]