After insertion of DNA segment within the sequence of Z-gene of bacteria, they are grown on chromogenic substrate. After the growth of bacterial colonies, they are identified as
(i) Recombinants if colonies are blue-coloured
(ii) Recombinants if colonies are blue coloured
(iii) Non-recombinants if colonies are blue-coloured
(iv) Non - recombinants if colonies are white coloured
A. iii, iv
B. i, iv
C. i, ii
D. ii, iii
