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
[{'content': 'Probing and irrigation is not done in ? \nSelect and explain. \nA. Lacrimal fistula, B. Acute dacryocystitis, C. Congenital dacryocystitis, D. Trauma to eye', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Acute Dacryocystitis Contraindications to probing and irrigation: The main contraindications are acute dacryocystitis and acute canaliculitis. In the setting of active infection, probing and irrigation is more likely to cause trauma because the lacrimal sac wall is inflamed and friable; it also can cause unnecessary pain and anxiety for the patient.", 'role': 'assistant'}]