Which of the following is true for Golden rice?

Identify the transgenic crops that are modified to develop natural resistance to insects or pests from the following:

Production of value-added products like nutrition supplements,pharmaceuticals,fuels,etc.,using transgenic crops is called:

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 inactive protoxin in $B. \text{ thuringiensis}$. However, after ingestion by the insect, the inactive protoxin gets converted into active form due to alkaline $pH$ of the insect gut.
In the light of the above statements, choose the correct answer from the options given below:

In $Bt$ cotton,what does $Bt$ stand for?

$A$ : $RNAi$ takes place in all eukaryotic organisms as a method of cellular defense.
$R$ : Complementary $dsRNA$ molecule binds to specific $mRNA$ and prevents its translation (silencing).