Recombinant dna are currently used to produce a. clothing dye, cheese and dye products b. human antibodies and vaccines c. crops that test better and stay fresh longer d. all of these

Recombinant DNA innovation gave an approach to researchers to create human insulin in the lab. The quality for human insulin is disengaged from human cells and embedded into plasmids. These plasmids are then brought into bacterial cells, which produce the insulin protein in view of the human code. 

Recombinant DNA are currently used for all of the above (d). 

D all of these! And more...