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': 'Osteomeatal complex(OMC) connects: \nSelect and explain. \nA. Nasal cavity with maxillary sinus, B. Nasal cavity with sphenoid sinus, C. The two nasal cavities, D. Ethmoidal sinus with ethmoidal bulla', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Osteomeatal complex lies in the middle meatus. It is final common drainage pathway for the maxillary,frontal,and anterior ethmoid sinuses into the nasal cavity. Ref.Scott Brown 7/e,Vol 2 p 1345', 'role': 'assistant'}]