This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and PNS, Subject name: ENT
[{'content': 'Opening of nasolacrimal duct is situated in: \nSelect and explain. \nA. Superior meatus, B. Middle meatus, C. Ethmoid infundibulum, D. inferior meatus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Also remember other structures opening in different meatuses.Superior meatus: Posterior ethmoid cellsMiddle meatus: Frontal sinus, maxillary sinus and anterior group of sinusesEthmoid infundibulum: A part of middle meatus, maxillary and sometimes the frontal sinus opens in itInferior meatus: Nasolacrimal ductSphenoethmoid recess: Sphenoid sinus', 'role': 'assistant'}]