Which of the following statement is correct?
(1) Dolly for the first transgenic cow
(2) This C peptide is not present in the mature insulin and is removed during maturation into insulin
(3) The first clinical gene therapy was given to a girl with adenosine deaminase (ADA) deficiency
(4) Polymerase Chain Reaction can be used for the early diagnosis of a disease
Choose the correct answer from the options given below:

Correct option is C

Recombinant DNA technology, Polymerase Chain Reaction (PCR) and Enzyme Linked Immuno-sorbent Assay (ELISA) are some of the techniques that serve the purpose of early diagnosis. The first clinical gene therapy was given in 1990 to a 4-year old girl with adenosine deaminase (ADA) deficiency. The first transgenic cow, Rosie, produced human protein-enriched milk (2.4 grams per litre).