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: ENT
[{'content': 'A patient presents with enophthalmos after a trauma to face by blunt object. There is no fever or extraocutar muscle palsy. Diagnosis is - \nSelect and explain. \nA. Fracture maxilla, B. Fracture zygoma, C. Blowout fracture, D. Fracture ethmoid', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]