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: Social & Preventive Medicine
[{'content': 'Target year for elimination of lymphatic filariasis \nSelect and explain. \nA. 2010, B. 2015, C. 2020, D. 2012', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]