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': 'Which one of the following insecticides is not used as a larvicides ? \nSelect and explain. \nA. Abate, B. Paris green, C. Fenthion, D. Dichloros', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]