The correct option is D Is nondegradable
The substance that cannot be decomposed by the natural decomposers and harm the environment is called as nonbiodegradable such as plastics, nuclear wastes or radioactive wastes, chemical wastes like DDT. As DDT harms the environment it is a pollutant. It is used to kill the mosquitoes thus, it is a chemical insecticide and not antibiotic. Hence, the correct answer is option D.