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': 'Incubation period for filariasis is - \nSelect and explain. \nA. 1 - 8 months, B. 8 - 16 months, C. 16 - 24 months, D. > 24 months', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]