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': 'Which of the following is/are true about lefos fracture \nSelect and explain. \nA. It is fracture of zygomatic bone, B. May cause CSF rhinorrhea, C. Type 1: complete separation of facial bones form the cranial bones, D. Classified as types 1 to 5', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B.May cause CSF rhinorrheaLe Fo I (transverse)- crosses lower pa of nasal septum, maxillary antra and the pterygoid plates.Le Fo II (pyramidal)- passes through the root ofnose, lacrimal bone, floor oforbit, upper pa of maxillary sinus and pterygoid platesLe Fo III (craniofacial dysjunction)- There is complete separation offacial bones from the cranial bones.Clinical features of maxillary fracture-Malocclusion of teethMobility in the maxillaCSF rhinorrhoea.', 'role': 'assistant'}]