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': 'All of the follow ing are larva control measures except - \nSelect and explain. \nA. Gambusia, B. Intermittent irrigation, C. DDT, D. paris green', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is `c' i.e., DDT", 'role': 'assistant'}]