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: Surgery
[{'content': 'Entrance into the sinus in a Caldwell procedure is made through the \nSelect and explain. \nA. Malar eminence, B. Canine fossa, C. Tuberosity, D. Zygomatic ridge', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]