Select correct option for sequence of steps involve in production of nematode resistance plants by RNAi effect:

(i) Using Agrobacterium vectors, nematode-specific genes were introduced into the host plant.

(ii) Sense and anti-sense RNA’s being complementary to each other formed a double stranded RNA that initiated RNAi

(iii) Transgenic plants are formed and parasite could not survive in a transgenic host expressing specific interfering RNA.

(iv) The introduce DNA produced both sense and anti-sense RNA in the host cells.

(v) Silencing of the specific mRNA of the nematode.

(vi) The transgenic plant therefore got itself protected from the parasite.