Which of the following $Bt$ crops is being grown in India by the farmers?

Which one of the following is a correct statement?

How does the $Bt$ toxin protein kill the insect?

The transgenic food crop which may help in solving the problem of night blindness in developing countries is . . . . . . .

$A$: Biofortified crops such as golden rice are helpful in overcoming the problem of night blindness in developing nations.
$R$: It has enhanced nutritional content of vitamin $A$.

$A$ - $A$ crop expressing a $cry$ gene is usually resistant to a group of insects.
$R$ - $Cry$ proteins produced from $Bacillus$ $thuringiensis$ are toxic to the larvae of certain insects.