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': 'True about anopheles mosquito – \nSelect and explain. \nA. Larvae have siphon tube, B. Larvae are surface feeder, C. Larvae are bottom feeder, D. Larvae lie at an angle to water surface', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]