All the following statements about Stanley Cohen and Herbert Boyer are correct but one is wrong. Which one is wrong
A. They discovered recombinant DNA (r-DNA) technology which marked the birth of modern biotechnology
B. They first produced. Healthyl sheep clone, a Finn Dorst lamb, Dolly from the differentaited adult mammary cells.
C. They invented genetic engineering by combining a piece of foreign DNA containing a gene from a bacterium with a bacterial (E coli) plasmid using the enzyme restriction endonuclease
D. They isolated the antibiotic resistance gene by cutting out a piece of DNA from a plasmid which was responsible for conferring antibiotic resistance .
