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 area is called a key area for orbital reconstruction: \nSelect and explain. \nA. Antero medial wall., B. Postero medial wall., C. Anterolateral wall., D. Posterolateral wall.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]