In plant cells,mutation can be induced by which of the following?

What is the most important aspect of biotechnology in the field of agricultural production?

$Bacillus\, thuringiensis$ $(Bt)$ strains are used to design:

In what form does the $Bt$ toxin get converted in an alkaline $pH$ medium?

Which process is useful in pest resistance plant?

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 :