This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
Which of the following represents a non deliberate cultural practice leading to anti-mosquito effect - 
Select and explain. 
A. Use of alkaline detergent, B. Use of larvicidal agents, C. Use of bed nets, D. Use of repellents
A: Use of alkaline detergent
Answer: A: Use of alkaline detergent 
Explanation: Larvicide agents are anti-larval measure. Bed net and repellants are used as protection against mosquito bites Park's Textbook of Preventive and Social Medicine, 25th Edition, Pg 832