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': 'Initial treatment of congenital dacryocystitis: \nSelect and explain. \nA. Massaging, B. Probing, C. DCR, D. Ointment', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Massaging', 'role': 'assistant'}]