This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Drugs, Subject name: Ophthalmology
The given instrument is used in which of the following 
Select and explain. 
A. Dacryocystorhinostomy, B. Probing and irrigation, C. Enucleation, D. Exentration
A: Dacryocystorhinostomy
Answer: A: Dacryocystorhinostomy 
Explanation: Ans. (a) DacryocystorhinostomyRef: Yanoff and Duker, 4/e, p. I486The nose is entered by pushing the instrument through the suture line between the lacrimal bone and the frontal process of the maxilla. Kerrison punches are used to remove the bone between the sac fossa and the nose.