The colonies of recombinant bacteria appear white in contrast to blue colonies of non recombinant bacteria because of

A

Inactivation of glycosidase enzyme in recombinant bacteria

B

Non-recombinant bacteria containing beta galactosidase

C

Insertional inactivation of alpha-galactosidase is non-recombinant bacteria

D

Insertional inactivation of alpha-galactosidase is recombinant bacteria