One of earliest pesticides used for grain storage by man was

Options :
  1. BHC
  2. neem leaves
  3. rotenone
  4. all the above

Answer and Explanation :-

Answer: Option 2


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You are guilty of no evil, Ransom of Thulcandra, except a little fearfulness. For that, the journey you go on is your pain, and perhaps your cure: for you must be either mad or brave before it is ended.
-C.S. Lewis Out of the Silent Planet