This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Blow out fracture orbit may involve \nSelect and explain. \nA. Floor, B. Apex, C. Lateral wall, D. Base', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Since medial wall is the weakest wall ,it can be involved in blow out fracture along with the floor. Such patients present with subcutaneous emphysema Refer khurana 6/e 410', 'role': 'assistant'}]