A) Rotenone
B) Pyrethrum
C) DDT
D) Humulin
Correct Answer: C
Solution :
DDT is the most hazardous, non-biodegradable insecticide, which is fat soluble but insoluble in water. It persists in the environment for a very long period. Being fat soluble, it accumulates in the animal tissues and gets concentrated at different trophic levels of food chain. It each step, DDT,o is moe concentrated. This is also called biomagnification.
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