Golden rice is enriched with which vitamin?

cry $II$ Ab and cry $I$ Ab produce toxins that control

Consider the following statements:
$I$. Flavr Savr is a genetically modified tomato,which remains fresh and retains its flavour much longer than the normal tomato due to the blocking of the synthesis of the fruit-softening enzyme polygalacturonase.
$II$. Recently,the $US$ government has patented the Indian 'basmati' rice as Rice-tec.
$III$. Viruses,bacteria,and some other harmful organisms can be used as bioweapons in biological warfare.
Which of the statements given above are correct?

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

Which catfish has become a threat to the indigenous catfish in our rivers?

Crystals of $Bt$ toxin produced by some bacteria do not kill the bacteria themselves because . . . . . .