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': 'Part of the orbit that fractures in blow out fracture of orbit is \nSelect and explain. \nA. Lateral wall, B. Floor of the orbit, C. Superior wall, D. Medial wall', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The weakest plate of bone, most commonly the orbital floor, fractures, and the orbital contents herniate down into the maxillary antrum. This soft-tissue herniation may lead to muscular dysfunction, particularly the inferior oblique and inferior rectus, leading to failure of the eye to rotate upwards.', 'role': 'assistant'}]