Assertion : Organochlorine pesticides are organic compounds that have been chlorinated.
Reason : Fenitrothion is one of the organochlorine pesticides.

If both the assertion and the reason are true and the reason is a correct explanation of the assertion

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If both the assertion and reason are true but the reason is not a correct explanation of the assertion

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If the assertion is true but the reason is false

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If both the assertion and reason are false

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If the assertion is false but reason is true

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Solution

The correct option is D If the assertion is true but the reason is false
Pesticides are the substances used to kill or repel pests. On the basis of chemical structure, major pesticides are grouped under five categories.(i) organochlorines (ii) organophosphates (iii) carbamates (iv) pyrethroids (v) triazines. Organochlorines are basically organic compounds that have been chlorinated and have very low bio - degradation and get accumulated in environment and possess serious problems. DDT, BHC, Aldrin and Endosulphan are the examples of organochlorines.
Fenitrothion is an example of organophosphate.
So, the correct answer is 'If the assertion is true but the reason is false'

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