This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Congenital Lesions and Stridor, Subject name: ENT
Osteomeatal complex connects: 
Select and explain. 
A. Nasal cavity with maxillary sinus, B. Nasal cavity with sphenoid sinus, C. The two nasal cavities, D. Nasal cavity with lacrimal sac
A: Nasal cavity with maxillary sinus
Answer: A: Nasal cavity with maxillary sinus 
Explanation: (a) Nasal cavity with maxillary sinus(Ref. Cummings, 6th ed., 752)All the structures of the middle meatus together constitutes osteomeatal complex. The osteomeatal complex connects the nasal cavity with maxillary, frontal and anterior ethmoid sinuses.Spheno-ethmoidal recess connects Sphenoid sinus with nasal cavity.Nasolacrimal duct connects nasal cavity with lacrimal sac.The two nasal cavities remain separated by the nasal septum