Which of the following is based upon the principle of antigen-antibody interaction?

Which of the following is used for the treatment of genetic disorders?

The genetic defect-adenosine deaminase $(ADA)$ deficiency may be cured permanently by

The Indian Parliament recently cleared which amendment of the Indian Patent Bill?

Which of the following statements is $NOT$ correct?

With regard to insulin,choose the correct options.
$(a)$ $C$-peptide is not present in mature insulin.
$(b)$ The insulin produced by $rDNA$ technology has $C$-peptide.
$(c)$ The pro-insulin has $C$-peptide.
$(d)$ $A$-peptide and $B$-peptide of insulin are interconnected by disulphide bridges.
Choose the correct answer from the options given below.