This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and paranasal sinuses, Subject name: ENT
[{'content': 'Blow-out fracture refers to \nSelect and explain. \nA. Fracture of orbit, B. Fracture of nasal septum, C. Fracture base of skull, D. Fracture of mandible', 'role': 'user'}, {'content': "Answer: A \nExplanation: Isolated fractures of orbital floor, which occur when a large blunt object strikes the globes, are known as 'blow-out fractures' Ref: Textbook of diseases of ENT; PL Dhingra;7th edition, pg 206", 'role': 'assistant'}]