The toxin proteins isolated from $Bacillus$ $thuringiensis$, coded by which of the following genes would control cotton bollworms and corn borer, respectively?

Given below are two statements:
Statement $I$: $Bt$ toxins are insect group specific and coded by a gene $cry$ $IAc$.
Statement $II$: $Bt$ toxin exists as an inactive protoxin in $B. \text{ thuringiensis}$. However, after ingestion by the insect, the inactive protoxin gets converted into an active form due to the alkaline $pH$ of the insect gut.
In the light of the above statements, choose the correct answer from the options given below:

Which of the following is commonly used for the transfer of foreign $DNA$ into crop plants?

What is antisense technology?

By applying which of the following practices,contamination of hydroponics plants can be reduced?

$Bt$ toxin genes have been expressed in plants to provide resistance against:
$I.$ Tobacco budworm and armyworm
$II.$ Beetles
$III.$ Flies and mosquitoes
Choose the correct option.