What are the various advantages of using genetically modified plants to increase the overall yield of the crop?

Statement-$A$: At present,about $30$ recombinant therapeutics have been approved for human use the world over.
Statement-$B$: $27$ documented varieties of Basmati rice are grown in India.

Which of the following is a pathogen for dicot plants?

Silencing of a gene could be achieved through the use of

Identify the nematode from the following options.

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: