Pyrethrin is a common ingredient of

Options :
  1. mosquito coils
  2. fly sprays
  3. mosquito mats
  4. all the above


Answer and Explanation :-

Answer: Option 4

Explanation:

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I said to my soul, be still and wait without hope, for hope would be hope for the wrong thing wait without love, for love would be love of the wrong thing there is yet faith, but the faith and the love are all in the waiting. Wait without thought, for you are not ready for thought: So the darkness shall be the light, and the stillness the dancing.
-T.S. Eliot