This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lacrimal Gland, Subject name: Ophthalmology
In dacrocystorhinostomy (DCR) lacrimal sacs are directly opened into: 
Select and explain. 
A. Superior nasal meatus, B. Middle nasal meatus, C. Inferior nasal meatus, D. Nasolacrimal duct
B: Middle nasal meatus
Answer: B: Middle nasal meatus 
Explanation: Ans. b (Middle nasal meatus). (Ref. Basak's, Opthalmology, 2nd ed., pg, 282, 336)DACROCYSTORHINOSTOMY (DCR)# It is surgical procedure of choice in chronic dacrocystitis, in which a communication is made between lacrimal sac and middle meatus of nose.# Contraindications: (MH'2000)- DNS- Atrophic rhinitis- Carcinoma of lacrimal gland