This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose, Subject name: Anatomy
Spenoid sinus drains into which of the following - 
Select and explain. 
A. Spheno-ethmoidal recess, B. Middle meatus, C. Superior meatus, D. Hiatus semilunaris
A: Spheno-ethmoidal recess
Answer: A: Spheno-ethmoidal recess 
Explanation: Ans. is 'a' i.e., Spheno-ethmoidal recess Part of lateral nasal wallOpeningsInferiorNasolacrimal ductMiddleFrontal sinus, Maxillary sinus. Anterior ethmoidal sinusSuperiorPosterior ethmoidal sinusSphenoethmoidal recessSphenoid sinus