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': 'A fracture of eye by a ping pong bolt is: \nSelect and explain. \nA. Blow out fracture, B. Orbital fracture, C. Blow in fracture, D. Compound fracture', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]