The correct option is C DDT
DDT was used for malaria control at the end of WWII. National Malaria Eradication Programme (NMEP), started an attack phase for indoor residual spraying of DDT which resulted in malaria eradication. As a collateral benefit, DDT eliminated kala - azar and plague and wiped out nuisance of household insects. Such a spectacular success made the use of DDT popular.