If a person obtains transformants by inserting a recombinant DNA within the coding sequence of enzyme `beta-galatosidase, he will separate out recombinants from non-recombinats by which of the following observations ?
A. Non-recombinant colonies do not produce any colour whereas reccombinants give blue coloured colonies
B. Recombinant colonies do not produce any colour whereas non-recombinants given blue coloured colonies.
C. Recombinants and non-recombinants both produce blue coloured colonies
D. No colonies are formed due to insertional inactivation
