Which one of the following insecticides is the most persistent in soil?
Correct answer: C. Aldrin
- A. Malathion
- B. Gamma BHC
- C. Aldrin
- D. None of these
Explanation
Aldrin is a highly persistent organochlorine insecticide that remains in soil for a long time and can form persistent residues. Malathion breaks down relatively quickly, while gamma-BHC is generally less persistent than aldrin.
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