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': 'Nerve injured in Caldwell Lus operation is? \nSelect and explain. \nA. Lingual nerve, B. Infra orbital nerve, C. Optic nerve, D. Facial nerve', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is'b'i.e., Infra orbital nerve.Complications of Caldwell - Luc operationPost - operative bleeding. This can be controlled by nasal packAnaesthesia of the cheek due to stretching of infraorbital nerve. It may last for a few weeks or months.Anaesthesia TeethInjury to nasolacrimal ductSublabial fistula (oroantral fistula)Osteomyelitis of maxilla (rare)", 'role': 'assistant'}]