Which one is not a restriction enzyme?

Which of the following tools of recombinant $\text{DNA}$ technology is incorrectly paired with its use?

About gene gun method:
$I.$ This method is also known as biolistic technique.
$II.$ In this method,cells are bombarded with high-velocity micro-particles of gold or tungsten coated with $DNA$ in plants.
$III.$ Important crop plants like maize,rice,and wheat have now been transformed by this method.
Which of the statements given above are correct?

Known sequence of $DNA$ that is used to find a complementary $DNA$ strand is:

The ability to transform normal cells into cancerous cells is found in

Who constructed the first $r-DNA$ molecule?