This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy and Physiology of Nose and PNS, Subject name: ENT
The sphenoethmoidal recess has opening of - 
Select and explain. 
A. Maxillary sinus, B. Bullaethmoidalis, C. Ethmoid sinus, D. Sphenoid sinus
D: Sphenoid sinus
Answer: D: Sphenoid sinus 
Explanation: Ans. is 'd' i.e., Sphenoid sinus Part of lateral nasal wallOpeningsInferiorNasolacrimal ductMiddleFrontal sinus, Maxillary sinus, Anterior ethmoidal sinusSuperiorPosterior ethmoidal sinusSphenoethmoidal recessSphenoid sinus