What is $GEAC$ and what are its objectives?

In transgenics,the expression of a transgene in target tissue is determined by

The internal toxin named $Cry-1Ac$ obtained from $Bacillus$ $thuringiensis$ is effective against which of the following?

Given below are two statements:
Statement-$I$: In $\text{pBR}-322$,the restriction site of $\text{BamHI}$ is present on the $\text{Ampicillin}$ resistance gene.
Statement-$II$: $\text{RNAi}$ technique was used in the formation of nematode-resistant plants.
In the light of the above statements,choose the correct answer from the options given below:

Which part of the tobacco plant is infected by $Meloidogyne \ incognita$?

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?