Which among the following is not a natural insecticides

Options :
  1. Chrysanthemum
  2. Nicotiana tobaccum
  3. Ryania speciosa
  4. Piper nigrum


Answer and Explanation :-

Answer: Option 4

Explanation:

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I don't think of all the misery, but of the beauty that still remains.
-Anne Frank The Diary of a Young Girl