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': 'Exopthalmos not present in \nSelect and explain. \nA. Thyrotoxicosis, B. Blow in fracture, C. Blow out fracture, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]