Answer:
The type of competition that occurs in a competitive market without identical producers is a monopolistic one.
Explanation:
Monopolistic is correct because this is a type where there is only one producer dominating one sector, so even if the market is competative one, the particular sector will not be.
Pure competition is not correct because this is the final and perfect form of the competitive market, with fair and abundant competition in every sector.
An oligopoly is not correct because there has to be two or more (usually very small number) identical producers, so while it is not ideal, there is still some competition.