This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Rural & Urban Health Centres, Workers, Norms, Subject name: Social & Preventive Medicine
[{'content': 'Most common operation done by an Ophthalmologist in district hospital: \nSelect and explain. \nA. Phacoemulsification, B. Trabeculectomy, C. Bilateral lamellar tarsal rotation, D. Dacrocystorhinostomy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Most common Ophthalmologic services at District hospital: Cataract surgery with IOL implantation is the most common surgery at District hospital ECCE + IOL is most commonly followed by phacoemulsifaction.', 'role': 'assistant'}]