Agriculture production increased several times after the introduction of $DDT$.

$A$ : $RNAi$ takes place in all eukaryotic organisms as a method of cellular defense.
$R$ : Complementary $dsRNA$ molecule binds to specific $mRNA$ and prevents its translation (silencing).

Transgenic plants are the ones

Which one of the following is a correct statement?

Match the following columns:

Column-$I$	Column-$II$
$(a)$ $Bacillus \text{ } thuringiensis$	$(1)$ $Nematode$
$(b)$ $Meloidogyne \text{ } incognitia$	$(2)$ $Cry \text{ } protein$
$(c)$ $Agrobacterium$	$(3)$ $Genetically \text{ } engineered \text{ } insulin$
$(d)$ $E. \text{ } coli$	$(4)$ $Ti \text{ } plasmid$

Even though the highest number of varieties of this rice are found in India,which variety of rice was patented by a $U.S.$ company?