Identify the incorrect statement among the following.

Options

A. Insertional inactivation of `beta` - galactosidase leads to blue colour colonies.
B. In insertional inactivation , the rDNA is inserted within the coding sequence of an enzyme `beta` galactosidas.
C. Selection of recombinants due to inactivation of antiotic is a cumbersome procedure.
D. Insertional inactivation of `beta` - galactosidase leads to colourless colonies.

Answer

A