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: Ophthalmology
Nasolacrimal duct runs in the nasolacrimal canal. It is made up of all the following bones except 
Select and explain. 
A. Maxillary bone, B. Inferior nasal conchae, C. Lacrimal bone, D. Ethmoid
D: Ethmoid
Answer: D: Ethmoid 
Explanation: Answer- D. EthmoidNasolacrimal CanalThe canal containing the nasolacrimal duct is called the nasolacrirnal canal.It is formed by indentations in the inferior nasal conchae, maxilla and lacrimal bone.It drains to-into the nasal cavity through the anterior poion of the inferior meatus which is between the inferior concha and the floor ofthe nasal cavity.