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': 'Which of the following surgical approach was first described by Orringer for the management of carcinoma esophagus- \nSelect and explain. \nA. Transhiatal, B. Thoracoscopic, C. Left thoracoabdominal, D. Right thoracoabdomonal', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]