Which variety of rice was patented by a $U.S.$ company even though the highest number of varieties of this rice is found in India?

What triggers activation of protoxin to active $Bt$ toxin of Bacillus thuringiensis in bollworm?

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?

$GM$ brinjal in India has been developed for resistance against:

An improved variety of transgenic basmati rice:

Which of these is not an advantage of genetically modified crops?