Option 1) Flower

 Option 2) Leaf

 Option 3) Stem

Option 4) Root

Answer: Option 4) Root

• It is a single-stranded RNA that is complementary to a protein-coding messenger RNA (mRNA) that hybridizes with it and blocks protein translation.

• This method is also known as Gene knockdown. RNA I (Interference RNA) is also used for the same purpose

•  The roots of the tobacco plants are infected. The RNA I (Interference RNA) method is used to develop resistance against infection.