<prompt> Osteomeatal complexOMC connects:Nasal cavity with maxillary sinusNasal cavity with sphenoid sinusThe two nasal cavitiesEthmoidal sinus with ethmoidal bulla  <response>: 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 7e,Vol 2 p 1345 