What is antisense technology?
When a piece of RNA that is complementary in a sequence is used to stop the expression of a specific gene.
Rna polymerase producing DNA
A cell displaying a foreign antigen used for synthesis of antigens.
Production of somaclonal variations in tissue cultures.
As learnt in Pest Resistant Transgenic Plant Using RNAi -
Antisense technology is a process by which a piece of RNA that is complementary in the sequence is used to stop the expression of a specific gene. Hence, the correct option is (a).