What is the full form of $G.E.A.C.$?

Which gene controls the corn borer?

Golden rice
$I$. It is a transgenic variety of rice.
$II$. It contains a good quality of $\beta$-carotene (provitamin-$A$).
$III$. $\beta$-carotene is a principal source of vitamin-$A$.
$IV$. The grains of the rice are yellow in colour due to $\beta$-carotene. The rice is commonly called golden rice.
Which of the statements given above are correct?

Which one of the following is a correct statement?

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

What is true about $Bt$ toxin?