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B
Not available
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C
Inflammable
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D
Not degraded easily
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Solution
The correct option is D Not degraded easily Dichlorodiphenyltrichloroethane is a synthetic insecticide and a non-bio degradable substance which causes environmental pollution. It opens sodium ion channels in neurons, which leads to spasms and eventual death. Due to certain mutational changes in the insects, they become resistant to the DDT.