This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diseases of orbit, Lids and lacrimal apparatus, Subject name: Ophthalmology
[{'content': 'Blow up out fracture of zygomatic arch cause \nSelect and explain. \nA. Anosmia, B. Diplopia, C. Exophthalmous, D. Epistaxis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Blow out fracture is the fracture of floor due to blunt trauma. Floor is formed of zygomatic arch ,maxillary bone and small palatine bone Refer khurana 6/e 403', 'role': 'assistant'}]