The correct answer is selective medium.
Selective media permit some kinds of organisms to grow and prevent the growth of other species. The selectivity is obtained in many ways. For example, species that can use a given sugar are easily selected by making that sugar the only source of carbon in the medium.
On the other hand, selective inhibition of some kinds of microbes can be attained by supplementing antibiotics, dyes, specific inhibitors or salts that influence the metabolism or enzymatic mechanisms of the microbes.
