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 of the following represents a non deliberate cultural practice leading to anti-mosquito effect? \nSelect and explain. \nA. Use of alkaline detergent, B. Use of larvicidal agents, C. Use of bed nets, D. Use of repellents', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Use of alkaline detergent or soap water has a distinct anti-mosquito effect, as mosquitoes do not grow in water with alkali. Since most soaps and detergents are alkali based, use of soaps and detergents have a non-deliberate anti-mosquito effect. Ref: Preventive and Social Medicine, by K.Park, 19th Edition, Page 626-628 and 20th Edition, Page 676', 'role': 'assistant'}]