Select the incorrect statement 

Options

A. In 1983, an American company Elililly produced chain -A and chain B separately by introducing two DNA sequences in plasmid of E. Coli.
B. Insulin consists of chains two -A and chain-B which are linked to eah other by disulphide bond
C. In world, about 20 recombinant therapeutics have been approved for human use, of which about 10 are being marketed in Indian at present
D. Earlier, insulin was isolated from pancreas of the slaughtered cattele and pigs

Answer

C