The following are DDT resistant except -: (A) Phlebotomus, (B) Culex fatigans, (C) Anopheles stephenci, (D) Musca domestica
Answer is A. 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