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': 'Commonest complication of Caldwell-Luc operation is \nSelect and explain. \nA. Oroantral fistula, B. Infra orbital nerve palsy, C. Haemorrhage, D. Orbital cellulitis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: "The most common complication is paresthesia of the cheek, teeth and gingiva secondary to stretch injury of the infraorbital nerve".\xa0─ Microendoscopic surgery\n"The most common complication is postoperative hypoesthesia of cheek and teeth".\xa0— Head & Neck surgery : otolaryngology\nComplications of Caldwell - Luc operation \n\nPostoperative bleeding. This can be controlled by a nasal pack\nAnaesthesia of the cheek due to stretching of the infraorbital nerve. It may last for a few weeks or months.\nAnaesthesia of teeth\nInjury to nasolacrimal duct\nSublabial fistula (oroantral fistula)\nOsteomyelitis of maxilla (rare)', 'role': 'assistant'}]