<prompt> Osteomeatal complex OMC 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 the final common drainage pathway for the maxillary, frontal and anterior ethmoid sinuses into the nasal cavity. 