This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
[{'content': 'Sphenoidal sinus drains into ? \nSelect and explain. \nA. Superior meatus, B. Inferior meatus, C. Middle meatus, D. Sphenoethmoidal recess', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Sphenoethmoidal recess Pa of lateral nasal wall Openings Inferior Nasolacrimal duct Middle Frontal sinus, Maxillary sinus, Anterior ethmoidal sinus Superior Posterior ethmoidal sinus Sphenoethmoidal recess Sphenoid sinus", 'role': 'assistant'}]