The first transgenic plant was tobacco. It contains a resistance gene against which of the following?

Select the appropriate option for organisms used in biotechnology.

What is the main characteristic observed in $BT$ cotton?

Bacillus thuringiensis $(Bt)$ strains have been used for designing novel:

$Bt$ cotton is resistant to pests,such as lepidopterans,dipterans,and coleopterans. Is $Bt$ cotton also resistant to other pests as well?

Given below are $2$ statements: one is labelled as Assertion $(A)$ and other is labelled as Reason $(R)$.
Assertion $(A) :-$ Toxic insecticidal protein of Bacillus thuringiensis does not kill Bacillus itself.
Reason $(R) :-$ In Bacillus,$Bt$ toxin protein exists as inactive protoxins.
Correct answer from the options given below :