Gene therapy is:

Given below are two statements:
Statement $I$: $Adenosine \ deaminase$ is crucial for the immune system to function.
Statement $II$: $Adenosine \ deaminase$ deficiency can be cured only by bone marrow transplantation.
In the light of the above statements, choose the correct answer from the options given below.

Which of the following is used as a vector in gene therapy?

Choose the correct option regarding $ELISA$.

The first human hormone prepared by using recombinant $DNA$ technology is?

Techniques that serve the purpose of early diagnosis include