Which of the following classes of phylum proteobacteria is not correctly matched with its description?

• A. Gammaproteobacteria: a broad range of bacteria with diverse metabolic capabilities and ecological roles.
• B. Deltaproteobacteria: They are a diverse group of bacteria that occupy various habitats, including marine sediments.
• C. Epsilonproteobacteria: They are often found in environments with high temperatures or low oxygen concentrations.
• D. Betaproteobacteria: They are a relatively newly discovered class, primarily known for their role in iron oxidation.

Answer: (D)