Which variety of cotton has been developed with the help of $Bacillus$ $thuringiensis$?

$A$: $Bt$ toxin are protein crystals containing insecticidal protein.
$R$: $B. \text{ thuringiensis}$ forms these protein crystals throughout continuously during their growth period.

Golden rice is a genetically modified crop plant where the incorporated gene is meant for biosynthesis of

$Cry$ $IAb$ effectively controls

The toxic $Cry$ protein is released by the spores of . . . . . . which kills the larvae of butterflies feeding on plants like $Brassica$.

The genetically engineered crop which has been recently introduced in India is