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
The following are DDT resistant except - 
Select and explain. 
A. Phlebotomus, B. Culex fatigans, C. Anopheles stephenci, D. Musca domestica
A: Phlebotomus
Answer: A: Phlebotomus 
Explanation: Resistance to DDT has not been demonstrated in Phlebotomus. Organochloride resistance is divided into Resistance to DDT and analogues Resistance to HCH-Dieldrin group of insecticides Park's Textbook of Preventive and Social Medicine, 25th Edition, Pg 845