Mature insulin does not contain ........

In the treatment of $ADA$ deficiency during gene therapy,which cells are collected from the patient's blood?

Humulin is

At present,about ........ recombinant therapeutics have been approved for human use the world over. Out of these,........ are being marketed in India.

The $ADA$ deficiency can be permanently cured by:

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.