ENT General ccba1188 Osteomeatal complex (OMC) connects: A Nasal cavity with maxillary sinus B Nasal cavity with sphenoid sinus C The two nasal cavities D Ethmoidal sinus with ethmoidal bulla High-Yield Explanation Osteomeatal complex lies in the middle meatus.It is the final common drainage pathway for the maxillary, frontal and anterior ethmoid sinuses into the nasal cavity.