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': 'Primary treatment of dacrocystitis - \nSelect and explain. \nA. Massage, B. Probing, C. Surgery, D. Antibiotic drops', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Massage increases the hydrostatic pressure in the sac and help to open the membranous occlusions and it carried out 4 times a day to be followed by antibiotic drops. Ref Ak khurana 6th edition', 'role': 'assistant'}]