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 o these areas is called the "key area" for orbital reconstruction? \nSelect and explain. \nA. Postero-medical wall, B. Postero-lateral wall, C. Antero-medial wall, D. Antero-lateral wall', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The postero-medial wall and its transition in to the posterior orbital floor is one of the most critical components of orbital reconstruction. It is called the key area and recommended to reconstruct it with rigid fixation as the first step.', 'role': 'assistant'}]