This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diseases of orbit, Lids and lacrimal apparatus, Subject name: Ophthalmology
[{'content': 'Surgery of choice for chronic acquired dacryocystitis- \nSelect and explain. \nA. Dacryocystorhinostomy, B. Dacryocystectomy, C. Conjunctivo-cystorhinostomy, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: It should be the operation of choice as it re-establishes the lacrimal drainage Ref: ak khurana 6th edition pg no395', 'role': 'assistant'}]