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': 'Most common complication of cadwell-luc operation is: \nSelect and explain. \nA. oroantral fistula, B. Infraorbital nerve palsy, C. Hemorrhage, D. Orbital cellulitis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Most common complication of Caldwell-Luc operation is injury to infraorbital nerve which occurs is 21% cases. Ref.Scott Brown 7/e,Vol 2,p1494.', 'role': 'assistant'}]