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': 'A 32 year old female patient underwent extraction of an upper first molar on right side and 0.3 mm of perforation was created into the sinus wall.\nCaldwell luc incision begins from \nSelect and explain. \nA. Canine fossa, B. Tuberosity, C. Zygomatic buttress, D. Above the communication', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]